)]}' { "log": [ { "commit": "53b4f1f0348a4e335fe05906c13591c340d81a4e", "tree": "9142eaf20cc68108f3da6672774ccdf0b3f1b2ea", "parents": [ "12cc41c1fae385eb8ceaff6964a155595c98a815" ], "author": { "name": "Willy Tarreau", "email": "w@1wt.eu", "time": "Mon Jan 18 16:36:09 2016 +0100" }, "committer": { "name": "Nick Reuter", "email": "nreuter85@gmail.com", "time": "Fri Aug 05 02:07:58 2016 -0500" }, "message": "pipe: limit the per-user amount of pages allocated in pipes\n\nOn no-so-small systems, it is possible for a single process to cause an\nOOM condition by filling large pipes with data that are never read. A\ntypical process filling 4000 pipes with 1 MB of data will use 4 GB of\nmemory. On small systems it may be tricky to set the pipe max size to\nprevent this from happening.\n\nThis patch makes it possible to enforce a per-user soft limit above\nwhich new pipes will be limited to a single page, effectively limiting\nthem to 4 kB each, as well as a hard limit above which no new pipes may\nbe created for this user. This has the effect of protecting the system\nagainst memory abuse without hurting other users, and still allowing\npipes to work correctly though with less data at once.\n\nThe limit are controlled by two new sysctls : pipe-user-pages-soft, and\npipe-user-pages-hard. Both may be disabled by setting them to zero. The\ndefault soft limit allows the default number of FDs per process (1024)\nto create pipes of the default size (64kB), thus reaching a limit of 64MB\nbefore starting to create only smaller pipes. With 256 processes limited\nto 1024 FDs each, this results in 1024*64kB + (256*1024 - 1024) * 4kB \u003d\n1084 MB of memory allocated for a user. The hard limit is disabled by\ndefault to avoid breaking existing applications that make intensive use\nof pipes (eg: for splicing).\n\nReported-by: socketpair@gmail.com\nReported-by: Tetsuo Handa \u003cpenguin-kernel@I-love.SAKURA.ne.jp\u003e\nMitigates: CVE-2013-4312 (Linux 2.0+)\nSuggested-by: Linus Torvalds \u003ctorvalds@linux-foundation.org\u003e\nSigned-off-by: Willy Tarreau \u003cw@1wt.eu\u003e\nSigned-off-by: Al Viro \u003cviro@zeniv.linux.org.uk\u003e\n\nConflicts:\n\tDocumentation/sysctl/fs.txt\n\tfs/pipe.c\n\tinclude/linux/sched.h\n\nChange-Id: Ic7c678af18129943e16715fdaa64a97a7f0854be\nSigned-off-by: SteadyQuad \u003cSteadyQuad@gmail.com\u003e\n" }, { "commit": "aa064093b32bc5a386de8d441dabe262b78506c7", "tree": "8ea3df5dc581ff0eda7ab603d776df4dd487edba", "parents": [ "5eab130238adb0adc6100dbba713082c19794dbf" ], "author": { "name": "Kees Cook", "email": "keescook@chromium.org", "time": "Wed May 21 15:23:46 2014 -0700" }, "committer": { "name": "flintman", "email": "flintman@flintmancomputers.com", "time": "Mon Apr 27 08:04:55 2015 -0400" }, "message": "sched: move no_new_privs into new atomic flags\n\nSince seccomp transitions between threads requires updates to the\nno_new_privs flag to be atomic, the flag must be part of an atomic flag\nset. This moves the nnp flag into a separate task field, and introduces\naccessors.\n\nChange-Id: I479b0a4c5980dd2ad55634d68eec9ffeab8a9271\nSigned-off-by: Kees Cook \u003ckeescook@chromium.org\u003e\nReviewed-by: Oleg Nesterov \u003coleg@redhat.com\u003e\nReviewed-by: Andy Lutomirski \u003cluto@amacapital.net\u003e\n" }, { "commit": "5eab130238adb0adc6100dbba713082c19794dbf", "tree": "e4c0af7539ca574904595f40c2344602116b2160", "parents": [ "d7a4f76933fc2be05f2837f46045039c9d187d45" ], "author": { "name": "Kees Cook", "email": "keescook@chromium.org", "time": "Wed May 21 15:23:46 2014 -0700" }, "committer": { "name": "flintman", "email": "flintman@flintmancomputers.com", "time": "Mon Apr 27 08:04:54 2015 -0400" }, "message": "sched: move no_new_privs into new atomic flags\n\nSince seccomp transitions between threads requires updates to the\nno_new_privs flag to be atomic, the flag must be part of an atomic flag\nset. This moves the nnp flag into a separate task field, and introduces\naccessors.\n\nChange-Id: I4e764b1b1eb5296a3f7e498a89cfdd6624796c87\nSigned-off-by: Kees Cook \u003ckeescook@chromium.org\u003e\nReviewed-by: Oleg Nesterov \u003coleg@redhat.com\u003e\nReviewed-by: Andy Lutomirski \u003cluto@amacapital.net\u003e\n" }, { "commit": "807936ec50ca1e4daab2daab94db3d5b2e02da9c", "tree": "56399c5141d74df9d4313a83c4bd9671e3e73701", "parents": [ "2fb2c1442ff99946dfcd07bc5ce19ffd3cc4582a" ], "author": { "name": "Will Drewry", "email": "wad@chromium.org", "time": "Fri Jan 13 14:40:01 2012 -0600" }, "committer": { "name": "flintman", "email": "flintman@flintmancomputers.com", "time": "Mon Apr 27 08:04:41 2015 -0400" }, "message": "seccomp: kill the seccomp_t typedef\n\nReplaces the seccomp_t typedef with struct seccomp to match modern\nkernel style.\n\nSigned-off-by: Will Drewry \u003cwad@chromium.org\u003e\nReviewed-by: James Morris \u003cjmorris@namei.org\u003e\nAcked-by: Serge Hallyn \u003cserge.hallyn@canonical.com\u003e\nAcked-by: Eric Paris \u003ceparis@redhat.com\u003e\n\nv18: rebase\n...\nv14: rebase/nochanges\nv13: rebase on to 88ebdda6159ffc15699f204c33feb3e431bf9bdc\nv12: rebase on to linux-next\nv8-v11: no changes\nv7: struct seccomp_struct -\u003e struct seccomp\nv6: original inclusion in this series.\n" }, { "commit": "e6cb10b981a73a5063da9fe85f722c181c4cecaa", "tree": "d6098fbf52bb07655e41fc5d824b150b2617f5ce", "parents": [ "119a6fdb9028a373bebde1a069957944fa142535" ], "author": { "name": "Oleg Nesterov", "email": "oleg@redhat.com", "time": "Tue Jan 21 15:49:56 2014 -0800" }, "committer": { "name": "flintman", "email": "flintman@flintmancomputers.com", "time": "Mon Apr 27 08:01:35 2015 -0400" }, "message": "introduce for_each_thread() to replace the buggy while_each_thread()\n\ncommit 0c740d0afc3bff0a097ad03a1c8df92757516f5c upstream.\n\nwhile_each_thread() and next_thread() should die, almost every lockless\nusage is wrong.\n\n1. Unless g \u003d\u003d current, the lockless while_each_thread() is not safe.\n\n while_each_thread(g, t) can loop forever if g exits, next_thread()\n can\u0027t reach the unhashed thread in this case. Note that this can\n happen even if g is the group leader, it can exec.\n\n2. Even if while_each_thread() itself was correct, people often use\n it wrongly.\n\n It was never safe to just take rcu_read_lock() and loop unless\n you verify that pid_alive(g) \u003d\u003d T, even the first next_thread()\n can point to the already freed/reused memory.\n\nThis patch adds signal_struct-\u003ethread_head and task-\u003ethread_node to\ncreate the normal rcu-safe list with the stable head. The new\nfor_each_thread(g, t) helper is always safe under rcu_read_lock() as\nlong as this task_struct can\u0027t go away.\n\nNote: of course it is ugly to have both task_struct-\u003ethread_node and the\nold task_struct-\u003ethread_group, we will kill it later, after we change\nthe users of while_each_thread() to use for_each_thread().\n\nPerhaps we can kill it even before we convert all users, we can\nreimplement next_thread(t) using the new thread_head/thread_node. But\nwe can\u0027t do this right now because this will lead to subtle behavioural\nchanges. For example, do/while_each_thread() always sees at least one\ntask, while for_each_thread() can do nothing if the whole thread group\nhas died. Or thread_group_empty(), currently its semantics is not clear\nunless thread_group_leader(p) and we need to audit the callers before we\ncan change it.\n\nSo this patch adds the new interface which has to coexist with the old\none for some time, hopefully the next changes will be more or less\nstraightforward and the old one will go away soon.\n\nSigned-off-by: Oleg Nesterov \u003coleg@redhat.com\u003e\nReviewed-by: Sergey Dyasly \u003cdserrg@gmail.com\u003e\nTested-by: Sergey Dyasly \u003cdserrg@gmail.com\u003e\nReviewed-by: Sameer Nanda \u003csnanda@chromium.org\u003e\nAcked-by: David Rientjes \u003crientjes@google.com\u003e\nCc: \"Eric W. Biederman\" \u003cebiederm@xmission.com\u003e\nCc: Frederic Weisbecker \u003cfweisbec@gmail.com\u003e\nCc: Mandeep Singh Baines \u003cmsb@chromium.org\u003e\nCc: \"Ma, Xindong\" \u003cxindong.ma@intel.com\u003e\nCc: Michal Hocko \u003cmhocko@suse.cz\u003e\nCc: \"Tu, Xiaobing\" \u003cxiaobing.tu@intel.com\u003e\nSigned-off-by: Andrew Morton \u003cakpm@linux-foundation.org\u003e\nSigned-off-by: Linus Torvalds \u003ctorvalds@linux-foundation.org\u003e\nSigned-off-by: Zefan Li \u003clizefan@huawei.com\u003e\n" }, { "commit": "1097d78180e1a2916c2bcdb15cb90ba131af9cd8", "tree": "5910f8fc0dcb85c71011ccccee18895769699390", "parents": [ "3ded4adc97887ddde3c1855f29f062e015d19425", "7fd7a446b1c2b96252e4389746e5419eae04faef" ], "author": { "name": "Paul", "email": "javelinanddart@gmail.com", "time": "Sun Jan 11 17:15:40 2015 -0800" }, "committer": { "name": "Ethan Chen", "email": "intervigil@gmail.com", "time": "Sun Jan 11 17:20:45 2015 -0800" }, "message": "Merge tag \u0027v3.4.105\u0027 into cm-12.0\n\nThis is the 3.4.105 stable release\n\nConflicts:\n\tarch/arm/mm/proc-v7.S\n\tdrivers/bluetooth/hci_ldisc.c\n\tdrivers/media/dvb/dvb-core/dmxdev.c\n\tdrivers/usb/core/driver.c\n\tdrivers/usb/dwc3/core.c\n\tdrivers/usb/host/xhci-hub.c\n\tdrivers/usb/host/xhci.c\n\tdrivers/usb/serial/qcserial.c\n\tdrivers/usb/serial/usb_wwan.c\n\tkernel/events/core.c\n\tkernel/time/tick-sched.ck\n\tkernel/futex.c\n\tmm/memory_hotplug.c\n\tmm/vmscan.c\n\tnet/bluetooth/hci_conn.c\n\tnet/bluetooth/hci_event.c\n\tnet/bluetooth/l2cap_core.c\n\tnet/ipv4/ping.c\n\tnet/wireless/nl80211.c\n\tsound/soc/soc-core.c\n\nChange-Id: Id09da84afb427ba1a32ff26e74f2bb86458d4a2e\n" }, { "commit": "9bf75dffc07ea6b5e19251880b8dcf0debdbbccc", "tree": "329bb5327b7e523ed2812dc6679b035f594f69f5", "parents": [ "74cfe2dcc0f4b17f9abbabf349e33c39a260987e" ], "author": { "name": "Andy Lutomirski", "email": "luto@amacapital.net", "time": "Thu Apr 12 16:47:50 2012 -0500" }, "committer": { "name": "Ethan Chen", "email": "intervigil@gmail.com", "time": "Tue Dec 16 13:18:02 2014 -0800" }, "message": "Add PR_{GET,SET}_NO_NEW_PRIVS to prevent execve from granting privs\n\nWith this change, calling\n prctl(PR_SET_NO_NEW_PRIVS, 1, 0, 0, 0)\ndisables privilege granting operations at execve-time. For example, a\nprocess will not be able to execute a setuid binary to change their uid\nor gid if this bit is set. The same is true for file capabilities.\n\nAdditionally, LSM_UNSAFE_NO_NEW_PRIVS is defined to ensure that\nLSMs respect the requested behavior.\n\nTo determine if the NO_NEW_PRIVS bit is set, a task may call\n prctl(PR_GET_NO_NEW_PRIVS, 0, 0, 0, 0);\nIt returns 1 if set and 0 if it is not set. If any of the arguments are\nnon-zero, it will return -1 and set errno to -EINVAL.\n(PR_SET_NO_NEW_PRIVS behaves similarly.)\n\nThis functionality is desired for the proposed seccomp filter patch\nseries. By using PR_SET_NO_NEW_PRIVS, it allows a task to modify the\nsystem call behavior for itself and its child tasks without being\nable to impact the behavior of a more privileged task.\n\nAnother potential use is making certain privileged operations\nunprivileged. For example, chroot may be considered \"safe\" if it cannot\naffect privileged tasks.\n\nNote, this patch causes execve to fail when PR_SET_NO_NEW_PRIVS is\nset and AppArmor is in use. It is fixed in a subsequent patch.\n\nSigned-off-by: Andy Lutomirski \u003cluto@amacapital.net\u003e\nSigned-off-by: Will Drewry \u003cwad@chromium.org\u003e\nAcked-by: Eric Paris \u003ceparis@redhat.com\u003e\nAcked-by: Kees Cook \u003ckeescook@chromium.org\u003e\n\nChange-Id: I2159006d20daefe6add5adc47c22bdbcd7d79e3a\nv18: updated change desc\nv17: using new define values as per 3.4\nSigned-off-by: James Morris \u003cjames.l.morris@oracle.com\u003e\n" }, { "commit": "4fae6ccac642aa30d189dea30ef14306aad4d2d2", "tree": "f4277880c2438c5ef039b4a88d818555150799f9", "parents": [ "699c06b386d592bede77d5a28ed1637c80ab99c0" ], "author": { "name": "Zefan Li", "email": "lizefan@huawei.com", "time": "Thu Sep 25 09:41:02 2014 +0800" }, "committer": { "name": "Zefan Li", "email": "lizefan@huawei.com", "time": "Mon Dec 01 18:02:38 2014 +0800" }, "message": "cpuset: PF_SPREAD_PAGE and PF_SPREAD_SLAB should be atomic flags\n\ncommit 2ad654bc5e2b211e92f66da1d819e47d79a866f0 upstream.\n\nWhen we change cpuset.memory_spread_{page,slab}, cpuset will flip\nPF_SPREAD_{PAGE,SLAB} bit of tsk-\u003eflags for each task in that cpuset.\nThis should be done using atomic bitops, but currently we don\u0027t,\nwhich is broken.\n\nTetsuo reported a hard-to-reproduce kernel crash on RHEL6, which happened\nwhen one thread tried to clear PF_USED_MATH while at the same time another\nthread tried to flip PF_SPREAD_PAGE/PF_SPREAD_SLAB. They both operate on\nthe same task.\n\nHere\u0027s the full report:\nhttps://lkml.org/lkml/2014/9/19/230\n\nTo fix this, we make PF_SPREAD_PAGE and PF_SPREAD_SLAB atomic flags.\n\nv4:\n- updated mm/slab.c. (Fengguang Wu)\n- updated Documentation.\n\nCc: Peter Zijlstra \u003cpeterz@infradead.org\u003e\nCc: Ingo Molnar \u003cmingo@kernel.org\u003e\nCc: Miao Xie \u003cmiaox@cn.fujitsu.com\u003e\nCc: Kees Cook \u003ckeescook@chromium.org\u003e\nFixes: 950592f7b991 (\"cpusets: update tasks\u0027 page/slab spread flags in time\")\nReported-by: Tetsuo Handa \u003cpenguin-kernel@I-love.SAKURA.ne.jp\u003e\nSigned-off-by: Zefan Li \u003clizefan@huawei.com\u003e\nSigned-off-by: Tejun Heo \u003ctj@kernel.org\u003e\n[lizf: Backported to 3.4:\n - adjust context\n - check current-\u003eflags \u0026 PF_MEMPOLICY rather than current-\u003emempolicy]\n" }, { "commit": "699c06b386d592bede77d5a28ed1637c80ab99c0", "tree": "f05290151e1f98926d21fd63aa38ffbb94c85538", "parents": [ "f4d8504c6629c83dd6eec43a2eb7f34b9bae09a7" ], "author": { "name": "Zefan Li", "email": "lizefan@huawei.com", "time": "Thu Sep 25 09:40:40 2014 +0800" }, "committer": { "name": "Zefan Li", "email": "lizefan@huawei.com", "time": "Mon Dec 01 18:02:38 2014 +0800" }, "message": "sched: add macros to define bitops for task atomic flags\n\ncommit e0e5070b20e01f0321f97db4e4e174f3f6b49e50 upstream.\n\nThis will simplify code when we add new flags.\n\nv3:\n- Kees pointed out that no_new_privs should never be cleared, so we\nshouldn\u0027t define task_clear_no_new_privs(). we define 3 macros instead\nof a single one.\n\nv2:\n- updated scripts/tags.sh, suggested by Peter\n\nCc: Ingo Molnar \u003cmingo@kernel.org\u003e\nCc: Miao Xie \u003cmiaox@cn.fujitsu.com\u003e\nCc: Tetsuo Handa \u003cpenguin-kernel@I-love.SAKURA.ne.jp\u003e\nAcked-by: Peter Zijlstra (Intel) \u003cpeterz@infradead.org\u003e\nAcked-by: Kees Cook \u003ckeescook@chromium.org\u003e\nSigned-off-by: Zefan Li \u003clizefan@huawei.com\u003e\nSigned-off-by: Tejun Heo \u003ctj@kernel.org\u003e\n[lizf: Backported to 3.4:\n - adjust context\n - remove no_new_priv code\n - add atomic_flags to struct task_struct]\n" }, { "commit": "bb32d268211f1c70858a32e1402ecc09af173205", "tree": "d8f191500ea1020ed0028fadc23ece0d7c3ee973", "parents": [ "ceced05d7f2bedf5da09f4eb48075339cc23876e" ], "author": { "name": "Thomas Gleixner", "email": "tglx@linutronix.de", "time": "Tue Apr 09 09:33:34 2013 +0200" }, "committer": { "name": "Ethan Chen", "email": "intervigil@gmail.com", "time": "Sat Mar 29 00:49:56 2014 -0700" }, "message": "kthread: Prevent unpark race which puts threads on the wrong cpu\n\nThe smpboot threads rely on the park/unpark mechanism which binds per\ncpu threads on a particular core. Though the functionality is racy:\n\nCPU0\t \t \tCPU1 \t \t CPU2\nunpark(T)\t\t\t\t wake_up_process(T)\n clear(SHOULD_PARK)\tT runs\n\t\t\tleave parkme() due to !SHOULD_PARK\n bind_to(CPU2)\t\tBUG_ON(wrong CPU)\n\nWe cannot let the tasks move themself to the target CPU as one of\nthose tasks is actually the migration thread itself, which requires\nthat it starts running on the target cpu right away.\n\nThe solution to this problem is to prevent wakeups in park mode which\nare not from unpark(). That way we can guarantee that the association\nof the task to the target cpu is working correctly.\n\nAdd a new task state (TASK_PARKED) which prevents other wakeups and\nuse this state explicitly for the unpark wakeup.\n\nPeter noticed: Also, since the task state is visible to userspace and\nall the parked tasks are still in the PID space, its a good hint in ps\nand friends that these tasks aren\u0027t really there for the moment.\n\nThe migration thread has another related issue.\n\nCPU0\t \t \t CPU1\nBring up CPU2\ncreate_thread(T)\npark(T)\n wait_for_completion()\n\t\t\t parkme()\n\t\t\t complete()\nsched_set_stop_task()\n\t\t\t schedule(TASK_PARKED)\n\nThe sched_set_stop_task() call is issued while the task is on the\nrunqueue of CPU1 and that confuses the hell out of the stop_task class\non that cpu. So we need the same synchronizaion before\nsched_set_stop_task().\n\nReported-by: Dave Jones \u003cdavej@redhat.com\u003e\nReported-and-tested-by: Dave Hansen \u003cdave@sr71.net\u003e\nReported-and-tested-by: Borislav Petkov \u003cbp@alien8.de\u003e\nAcked-by: Peter Ziljstra \u003cpeterz@infradead.org\u003e\nCc: Srivatsa S. Bhat \u003csrivatsa.bhat@linux.vnet.ibm.com\u003e\nCc: dhillf@gmail.com\nCc: Ingo Molnar \u003cmingo@kernel.org\u003e\nCc: stable@vger.kernel.org\nLink: http://lkml.kernel.org/r/alpine.LFD.2.02.1304091635430.21884@ionos\nSigned-off-by: Thomas Gleixner \u003ctglx@linutronix.de\u003e\n\nChange-Id: If1e9993951c4ad1f6f35ad0698f6ccd05a67e81f\n" }, { "commit": "66d383de0963dd351051304e36247e9a6fa66b77", "tree": "5cd17ffcb6edfa4385a2ceddb63ada9efdea2ee1", "parents": [ "c523abc466c9b7c693e4a528ca2f54c6e931b6a6", "2606524141e4ff9b6a5d0bcbd9d601dfc5a8285c" ], "author": { "name": "Ethan Chen", "email": "intervigil@gmail.com", "time": "Fri Mar 07 11:56:04 2014 -0800" }, "committer": { "name": "Ethan Chen", "email": "intervigil@gmail.com", "time": "Fri Mar 07 11:56:04 2014 -0800" }, "message": "Merge tag \u0027v3.4.82\u0027 into cm-11.0\n\nThis is the 3.4.82 stable release\n\nConflicts:\n\tarch/arm/kernel/traps.c\n\tmm/internal.h\n\nChange-Id: Ie3b1ffdfe133e76cfa3eaaa4305535af8490d7cc\n" }, { "commit": "f5a4c4b79e57f875b6788f6f8352ca246bfd8450", "tree": "936b2200d4581b36faa0c94fab560013486885be", "parents": [ "e2d51f27e382be7b70a755f3ea2fbbeacdb50834" ], "author": { "name": "Peter Zijlstra", "email": "a.p.zijlstra@chello.nl", "time": "Thu May 17 17:15:29 2012 +0200" }, "committer": { "name": "Greg Kroah-Hartman", "email": "gregkh@linuxfoundation.org", "time": "Thu Feb 20 10:45:32 2014 -0800" }, "message": "sched/nohz: Fix rq-\u003ecpu_load calculations some more\n\ncommit 5aaa0b7a2ed5b12692c9ffb5222182bd558d3146 upstream.\n\nFollow up on commit 556061b00 (\"sched/nohz: Fix rq-\u003ecpu_load[]\ncalculations\") since while that fixed the busy case it regressed the\nmostly idle case.\n\nAdd a callback from the nohz exit to also age the rq-\u003ecpu_load[]\narray. This closes the hole where either there was no nohz load\nbalance pass during the nohz, or there was a \u0027significant\u0027 amount of\nidle time between the last nohz balance and the nohz exit.\n\nSo we\u0027ll update unconditionally from the tick to not insert any\naccidental 0 load periods while busy, and we try and catch up from\nnohz idle balance and nohz exit. Both these are still prone to missing\na jiffy, but that has always been the case.\n\nSigned-off-by: Peter Zijlstra \u003ca.p.zijlstra@chello.nl\u003e\nCc: pjt@google.com\nCc: Venkatesh Pallipadi \u003cvenki@google.com\u003e\nLink: http://lkml.kernel.org/n/tip-kt0trz0apodbf84ucjfdbr1a@git.kernel.org\nSigned-off-by: Ingo Molnar \u003cmingo@kernel.org\u003e\nCc: Li Zefan \u003clizefan@huawei.com\u003e\nSigned-off-by: Greg Kroah-Hartman \u003cgregkh@linuxfoundation.org\u003e\n\n" }, { "commit": "dbf3239455b155c3e72deacda93ef3a041e190c9", "tree": "c7a8cfce370fa0de4cdeaab1b75925061fe9ccf1", "parents": [ "f61eb9ceb26cee3fdbb8c7a4920f171f7661fb4f" ], "author": { "name": "Ying Xue", "email": "ying.xue@windriver.com", "time": "Tue Jul 17 15:03:43 2012 +0800" }, "committer": { "name": "Greg Kroah-Hartman", "email": "gregkh@linuxfoundation.org", "time": "Thu Feb 13 11:51:19 2014 -0800" }, "message": "sched/rt: Avoid updating RT entry timeout twice within one tick period\n\ncommit 57d2aa00dcec67afa52478730f2b524521af14fb upstream.\n\nThe issue below was found in 2.6.34-rt rather than mainline rt\nkernel, but the issue still exists upstream as well.\n\nSo please let me describe how it was noticed on 2.6.34-rt:\n\nOn this version, each softirq has its own thread, it means there\nis at least one RT FIFO task per cpu. The priority of these\ntasks is set to 49 by default. If user launches an RT FIFO task\nwith priority lower than 49 of softirq RT tasks, it\u0027s possible\nthere are two RT FIFO tasks enqueued one cpu runqueue at one\nmoment. By current strategy of balancing RT tasks, when it comes\nto RT tasks, we really need to put them off to a CPU that they\ncan run on as soon as possible. Even if it means a bit of cache\nline flushing, we want RT tasks to be run with the least latency.\n\nWhen the user RT FIFO task which just launched before is\nrunning, the sched timer tick of the current cpu happens. In this\ntick period, the timeout value of the user RT task will be\nupdated once. Subsequently, we try to wake up one softirq RT\ntask on its local cpu. As the priority of current user RT task\nis lower than the softirq RT task, the current task will be\npreempted by the higher priority softirq RT task. Before\npreemption, we check to see if current can readily move to a\ndifferent cpu. If so, we will reschedule to allow the RT push logic\nto try to move current somewhere else. Whenever the woken\nsoftirq RT task runs, it first tries to migrate the user FIFO RT\ntask over to a cpu that is running a task of lesser priority. If\nmigration is done, it will send a reschedule request to the found\ncpu by IPI interrupt. Once the target cpu responds the IPI\ninterrupt, it will pick the migrated user RT task to preempt its\ncurrent task. When the user RT task is running on the new cpu,\nthe sched timer tick of the cpu fires. So it will tick the user\nRT task again. This also means the RT task timeout value will be\nupdated again. As the migration may be done in one tick period,\nit means the user RT task timeout value will be updated twice\nwithin one tick.\n\nIf we set a limit on the amount of cpu time for the user RT task\nby setrlimit(RLIMIT_RTTIME), the SIGXCPU signal should be posted\nupon reaching the soft limit.\n\nBut exactly when the SIGXCPU signal should be sent depends on the\nRT task timeout value. In fact the timeout mechanism of sending\nthe SIGXCPU signal assumes the RT task timeout is increased once\nevery tick.\n\nHowever, currently the timeout value may be added twice per\ntick. So it results in the SIGXCPU signal being sent earlier\nthan expected.\n\nTo solve this issue, we prevent the timeout value from increasing\ntwice within one tick time by remembering the jiffies value of\nlast updating the timeout. As long as the RT task\u0027s jiffies is\ndifferent with the global jiffies value, we allow its timeout to\nbe updated.\n\nSigned-off-by: Ying Xue \u003cying.xue@windriver.com\u003e\nSigned-off-by: Fan Du \u003cfan.du@windriver.com\u003e\nReviewed-by: Yong Zhang \u003cyong.zhang0@gmail.com\u003e\nAcked-by: Steven Rostedt \u003crostedt@goodmis.org\u003e\nCc: \u003cpeterz@infradead.org\u003e\nLink: http://lkml.kernel.org/r/1342508623-2887-1-git-send-email-ying.xue@windriver.com\nSigned-off-by: Ingo Molnar \u003cmingo@kernel.org\u003e\n[ lizf: backported to 3.4: adjust context ]\nSigned-off-by: Li Zefan \u003clizefan@huawei.com\u003e\nSigned-off-by: Greg Kroah-Hartman \u003cgregkh@linuxfoundation.org\u003e\n\n" }, { "commit": "2a38ada0f1ab9f894eea4428731ebc811b51c3f3", "tree": "759c765808a23a3a35e4ba10d8306c847c0205b7", "parents": [ "19218e895cefdd389c96af12c93c89e7276bbaad", "44d19f5a04ae4e433548ba2f25e4d2ccfcac765e" ], "author": { "name": "Ethan Chen", "email": "intervigil@gmail.com", "time": "Sun Dec 08 12:50:38 2013 -0800" }, "committer": { "name": "Ethan Chen", "email": "intervigil@gmail.com", "time": "Sun Dec 08 12:50:38 2013 -0800" }, "message": "Merge tag \u0027v3.4.72\u0027 into tmp\n\nThis is the 3.4.72 stable release\n\nConflicts:\n\tarch/arm/Kconfig\n\tarch/arm/include/asm/mutex.h\n\tarch/arm/kernel/perf_event.c\n\tarch/arm/kernel/traps.c\n\tarch/arm/mm/dma-mapping.c\n\tdrivers/base/power/main.c\n\tdrivers/bluetooth/ath3k.c\n\tdrivers/bluetooth/btusb.c\n\tdrivers/gpu/drm/radeon/radeon_mode.h\n\tdrivers/mmc/card/block.c\n\tdrivers/mmc/host/sdhci.c\n\tdrivers/usb/core/message.c\n\tdrivers/usb/host/xhci-plat.c\n\tdrivers/usb/host/xhci.h\n\tdrivers/virtio/virtio_ring.c\n\tfs/ubifs/dir.c\n\tinclude/linux/freezer.h\n\tinclude/linux/virtio.h\n\tinclude/media/v4l2-ctrls.h\n\tinclude/net/bluetooth/hci_core.h\n\tinclude/net/bluetooth/mgmt.h\n\tkernel/cgroup.c\n\tkernel/futex.c\n\tkernel/signal.c\n\tnet/bluetooth/hci_conn.c\n\tnet/bluetooth/hci_core.c\n\tnet/bluetooth/hci_event.c\n\tnet/bluetooth/l2cap_core.c\n\tnet/bluetooth/mgmt.c\n\tnet/bluetooth/rfcomm/sock.c\n\tnet/bluetooth/smp.c\n\nChange-Id: I4fb0d5de74ca76f933d95d98e1a9c2c859402f34\n" }, { "commit": "8f77c2895be7f4cb22c918c1aab1270fd8885ecd", "tree": "c0598ef38714b949d4ffa81ce5bad361c922d64e", "parents": [ "a4710c60a66743df6277ce37ae2f9ed19fcdec09" ], "author": { "name": "Steve Muckle", "email": "smuckle@codeaurora.org", "time": "Mon Mar 11 16:33:42 2013 -0700" }, "committer": { "name": "Ethan Chen", "email": "intervigil@gmail.com", "time": "Tue Dec 03 22:08:22 2013 -0800" }, "message": "sched: provide per cpu-cgroup option to notify on migrations\n\nOn systems where CPUs may run asynchronously, task migrations\nbetween CPUs running at grossly different speeds can cause\nproblems.\n\nThis change provides a mechanism to notify a subsystem\nin the kernel if a task in a particular cgroup migrates to a\ndifferent CPU. Other subsystems (such as cpufreq) may then\nregister for this notifier to take appropriate action when\nsuch a task is migrated.\n\nThe cgroup attribute to set for this behavior is\n\"notify_on_migrate\" .\n\nChange-Id: Ie1868249e53ef901b89c837fdc33b0ad0c0a4590\nSigned-off-by: Steve Muckle \u003csmuckle@codeaurora.org\u003e\n" }, { "commit": "c0d30628ff1b424f041d83fee37daea5f84eb0a2", "tree": "d7bc2b3b5824eeddeb687c3547c21984e1d6c422", "parents": [ "7288f91dd5b55d82e1dee9f0d24e9f4730d57392" ], "author": { "name": "Kees Cook", "email": "keescook@chromium.org", "time": "Tue Nov 12 15:11:17 2013 -0800" }, "committer": { "name": "Greg Kroah-Hartman", "email": "gregkh@linuxfoundation.org", "time": "Fri Nov 29 10:50:34 2013 -0800" }, "message": "exec/ptrace: fix get_dumpable() incorrect tests\n\ncommit d049f74f2dbe71354d43d393ac3a188947811348 upstream.\n\nThe get_dumpable() return value is not boolean. Most users of the\nfunction actually want to be testing for non-SUID_DUMP_USER(1) rather than\nSUID_DUMP_DISABLE(0). The SUID_DUMP_ROOT(2) is also considered a\nprotected state. Almost all places did this correctly, excepting the two\nplaces fixed in this patch.\n\nWrong logic:\n if (dumpable \u003d\u003d SUID_DUMP_DISABLE) { /* be protective */ }\n or\n if (dumpable \u003d\u003d 0) { /* be protective */ }\n or\n if (!dumpable) { /* be protective */ }\n\nCorrect logic:\n if (dumpable !\u003d SUID_DUMP_USER) { /* be protective */ }\n or\n if (dumpable !\u003d 1) { /* be protective */ }\n\nWithout this patch, if the system had set the sysctl fs/suid_dumpable\u003d2, a\nuser was able to ptrace attach to processes that had dropped privileges to\nthat user. (This may have been partially mitigated if Yama was enabled.)\n\nThe macros have been moved into the file that declares get/set_dumpable(),\nwhich means things like the ia64 code can see them too.\n\nCVE-2013-2929\n\nReported-by: Vasily Kulikov \u003csegoon@openwall.com\u003e\nSigned-off-by: Kees Cook \u003ckeescook@chromium.org\u003e\nCc: \"Luck, Tony\" \u003ctony.luck@intel.com\u003e\nCc: Oleg Nesterov \u003coleg@redhat.com\u003e\nCc: \"Eric W. Biederman\" \u003cebiederm@xmission.com\u003e\nSigned-off-by: Andrew Morton \u003cakpm@linux-foundation.org\u003e\nSigned-off-by: Linus Torvalds \u003ctorvalds@linux-foundation.org\u003e\nSigned-off-by: Greg Kroah-Hartman \u003cgregkh@linuxfoundation.org\u003e\n\n" }, { "commit": "df4011e050b4e80165a317424e6b3367dfa7697c", "tree": "2aef78ae8ee675b60ec7798beda0b49e73545f51", "parents": [ "1a9a8c2c61437bc8ab745c96af936196f4684495" ], "author": { "name": "Oleg Nesterov", "email": "oleg@redhat.com", "time": "Tue Apr 30 15:28:20 2013 -0700" }, "committer": { "name": "Greg Kroah-Hartman", "email": "gregkh@linuxfoundation.org", "time": "Fri Nov 29 10:50:33 2013 -0800" }, "message": "exec: do not abuse -\u003ecred_guard_mutex in threadgroup_lock()\n\ncommit e56fb2874015370e3b7f8d85051f6dce26051df9 upstream.\n\nthreadgroup_lock() takes signal-\u003ecred_guard_mutex to ensure that\nthread_group_leader() is stable. This doesn\u0027t look nice, the scope of\nthis lock in do_execve() is huge.\n\nAnd as Dave pointed out this can lead to deadlock, we have the\nfollowing dependencies:\n\n\tdo_execve:\t\tcred_guard_mutex -\u003e i_mutex\n\tcgroup_mount:\t\ti_mutex -\u003e cgroup_mutex\n\tattach_task_by_pid:\tcgroup_mutex -\u003e cred_guard_mutex\n\nChange de_thread() to take threadgroup_change_begin() around the\nswitch-the-leader code and change threadgroup_lock() to avoid\n-\u003ecred_guard_mutex.\n\nNote that de_thread() can\u0027t sleep with -\u003egroup_rwsem held, this can\nobviously deadlock with the exiting leader if the writer is active, so it\ndoes threadgroup_change_end() before schedule().\n\nReported-by: Dave Jones \u003cdavej@redhat.com\u003e\nAcked-by: Tejun Heo \u003ctj@kernel.org\u003e\nAcked-by: Li Zefan \u003clizefan@huawei.com\u003e\nSigned-off-by: Oleg Nesterov \u003coleg@redhat.com\u003e\nCc: \u003cstable@vger.kernel.org\u003e\nSigned-off-by: Andrew Morton \u003cakpm@linux-foundation.org\u003e\nSigned-off-by: Linus Torvalds \u003ctorvalds@linux-foundation.org\u003e\n[ zhj: adjust context ]\nSigned-off-by: Zhao Hongjiang \u003czhaohongjiang@huawei.com\u003e\nSigned-off-by: Greg Kroah-Hartman \u003cgregkh@linuxfoundation.org\u003e\n" }, { "commit": "dde448d95d8698ee4c8373bb48fe08a22f41052f", "tree": "7fe87fa93bfa5b81e6f87b147e32512d2e8198e3", "parents": [ "ac4f6190fae02a3dc30133f90488b996f726bf7a", "f95b978981a7d154ba40d14c18e8ed5c694e6124" ], "author": { "name": "Ethan Chen", "email": "intervigil@gmail.com", "time": "Thu Jun 20 11:32:42 2013 -0700" }, "committer": { "name": "Ethan Chen", "email": "intervigil@gmail.com", "time": "Thu Jun 20 11:32:42 2013 -0700" }, "message": "Merge tag \u0027v3.4.10\u0027 into cm-10.1\n\nThis is the 3.4.10 stable release\n\nConflicts:\n\tarch/arm/mm/tlb-v7.S\n\tarch/arm/vfp/entry.S\n\tdrivers/base/power/main.c\n\tdrivers/mmc/host/sdhci.c\n\tdrivers/net/tun.c\n\tdrivers/usb/core/hub.c\n\tdrivers/usb/host/xhci.h\n\tinclude/linux/sched.h\n\tkernel/power/suspend.c\n\nChange-Id: Ia2477ec93ceb64b13dd1a2d8aa646cb233387d14\n" }, { "commit": "da445f9e543bce46e5303e81a4f6137c6f7ac7f8", "tree": "e6db67bd79971956421c6eaeef29ca3dcaf31db2", "parents": [ "8023e530f89f250eb562d0392918ce6cc721b077" ], "author": { "name": "Liam Mark", "email": "lmark@codeaurora.org", "time": "Thu Feb 07 14:31:36 2013 -0800" }, "committer": { "name": "Liam Mark", "email": "lmark@codeaurora.org", "time": "Thu Feb 21 10:19:19 2013 -0800" }, "message": "android/lowmemorykiller: Ignore tasks with freed mm\n\nA killed task can stay in the task list long after its\nmemory has been returned to the system, therefore\nignore any tasks whose mm struct has been freed.\n\nChange-Id: I76394b203b4ab2312437c839976f0ecb7b6dde4e\nCRs-fixed: 450383\nSigned-off-by: Liam Mark \u003clmark@codeaurora.org\u003e\n" }, { "commit": "b08d81801e151fbcefa81a551eadf2beff554752", "tree": "0a4c2ea3acdf76c7ac6aa1c8d675314e04d42f1f", "parents": [ "9c5f1b49341154b579851425dabb32cb3aa9b5db" ], "author": { "name": "Oleg Nesterov", "email": "oleg@redhat.com", "time": "Mon Jan 21 20:47:41 2013 +0100" }, "committer": { "name": "Greg Kroah-Hartman", "email": "gregkh@linuxfoundation.org", "time": "Sun Jan 27 20:47:43 2013 -0800" }, "message": "ptrace: introduce signal_wake_up_state() and ptrace_signal_wake_up()\n\ncommit 910ffdb18a6408e14febbb6e4b6840fd2c928c82 upstream.\n\nCleanup and preparation for the next change.\n\nsignal_wake_up(resume \u003d\u003e true) is overused. None of ptrace/jctl callers\nactually want to wakeup a TASK_WAKEKILL task, but they can\u0027t specify the\nnecessary mask.\n\nTurn signal_wake_up() into signal_wake_up_state(state), reintroduce\nsignal_wake_up() as a trivial helper, and add ptrace_signal_wake_up()\nwhich adds __TASK_TRACED.\n\nThis way ptrace_signal_wake_up() can work \"inside\" ptrace_request()\neven if the tracee doesn\u0027t have the TASK_WAKEKILL bit set.\n\nSigned-off-by: Oleg Nesterov \u003coleg@redhat.com\u003e\nSigned-off-by: Linus Torvalds \u003ctorvalds@linux-foundation.org\u003e\nSigned-off-by: Greg Kroah-Hartman \u003cgregkh@linuxfoundation.org\u003e\n\n" }, { "commit": "d448abac51854c994e6436713945ecf57c1badbb", "tree": "810413c28b120da523d140052cf8f104ade86280", "parents": [ "6dbd3b7dbcb05fe324bf629256ae5f0510c6a5f0" ], "author": { "name": "Steve Muckle", "email": "smuckle@codeaurora.org", "time": "Wed Oct 24 15:00:20 2012 -0700" }, "committer": { "name": "Sudhir Sharma", "email": "sudsha@codeaurora.org", "time": "Mon Dec 10 11:22:08 2012 -0800" }, "message": "sched: add sysctl for controlling task migrations on wake\n\nThe PF_WAKE_UP_IDLE per-task flag made it impossible to enable\nthe old behavior of SD_SHARE_PKG_RESOURCES, where every task\nmigrates to an idle CPU on wakeup.\n\nThe sched_wake_to_idle sysctl value, when made nonzero, will cause\nall tasks to migrate to an idle CPU if one is available when the\ntask is woken up. This is regardless of how PF_WAKE_UP_IDLE is\nconfigured for tasks in the system. Similar to PF_WAKE_UP_IDLE,\nthe SD_SHARE_PKG_RESOURCES scheduler domain flag must be enabled\nfor the sysctl value to have an effect.\n\nChange-Id: I23bed846d26502c7aed600bfcf1c13053a7e5f61\nSigned-off-by: Steve Muckle \u003csmuckle@codeaurora.org\u003e\n(cherry picked from commit 9d5b38dc0025d19df5b756b16024b4269e73f282)\n" }, { "commit": "ff96cd21849cdde73bda1326b00bbc046f20717e", "tree": "f734673877b26f1ee7f05637b03e87b06f88b312", "parents": [ "a4b025c0e15dbbecc98fb3d41fc5e9cc86fb133f" ], "author": { "name": "Steve Muckle", "email": "smuckle@codeaurora.org", "time": "Mon Sep 10 11:45:02 2012 -0700" }, "committer": { "name": "Sudhir Sharma", "email": "sudsha@codeaurora.org", "time": "Mon Nov 05 22:47:08 2012 -0800" }, "message": "sched: add PF_WAKE_UP_IDLE.\n\nCertain workloads may benefit from the SD_SHARE_PKG_RESOURCES behavior\nof waking their tasks up on idle CPUs. The feature has too much of a\nnegative impact on other workloads however to apply globally. The\nPF_WAKE_UP_IDLE flag tells the scheduler to wake up tasks that have this\nflag set, or tasks woken by tasks with this flag set, on an idle CPU\nif one is available.\n\nSigned-off-by: Steve Muckle \u003csmuckle@codeaurora.org\u003e\n(cherry picked from commit 500988016c53b675eae02401bd97462fed1737d6)\n\nChange-Id: I6996afacecaec2959b84794eb032fe0a1ef2b3d7\nSigned-off-by: Sudhir Sharma \u003csudsha@codeaurora.org\u003e\n" }, { "commit": "fe9a0d032a38012de574eed70a98c1385b23a4a1", "tree": "565e682eb7ad468be99e16d50af5db0cae9bb775", "parents": [ "cf28b20203654e39eac945781282e181cc4a4b1b" ], "author": { "name": "Jeff Ohlstein", "email": "johlstei@codeaurora.org", "time": "Tue Jun 19 15:59:46 2012 -0700" }, "committer": { "name": "Sudhir Sharma", "email": "sudsha@codeaurora.org", "time": "Tue Oct 30 20:12:11 2012 -0700" }, "message": "sched_avg: add run queue averaging.\n\nAdd code to calculate the run queue depth of a cpu and iowait\ndepth of the cpu.\n\nThe scheduler calls in to sched_update_nr_prod whenever there\nis a runqueue change. This function maintains the runqueue average\nand the iowait of that cpu in that time interval.\n\nWhoever wants to know the runqueue average is expected to call\nsched_get_nr_running_avg periodically to get the accumulated\nrunqueue and iowait averages for all the cpus.\n\nSigned-off-by: Jeff Ohlstein \u003cjohlstei@codeaurora.org\u003e\n(cherry picked from commit 0299fcaaad80e2c0ac9aa583c95107f6edc27750)\n\nSigned-off-by: Ram Kumar Chakravarthy Chebathini \u003crcheba@codeaurora.org\u003e\n(cherry picked from commit 5325d8a44f8296170cd8f42e245dd79f7b7347bf)\n\nChange-Id: I92875789886c3f7c2457a063de4b3b6d8c893718\nSigned-off-by: Sudhir Sharma \u003csudsha@codeaurora.org\u003e\n" }, { "commit": "e194fab8d7ebe95db5609f1cb6794c2afcc3118f", "tree": "2367f196d1cfa94a2078834bee0d4a64734eb884", "parents": [ "6418cc471b5d8a64ce22d2aa827fcb275e61449c" ], "author": { "name": "Peter Zijlstra", "email": "peterz@infradead.org", "time": "Fri Jun 22 13:36:05 2012 +0200" }, "committer": { "name": "Greg Kroah-Hartman", "email": "gregkh@linuxfoundation.org", "time": "Tue Oct 02 10:30:35 2012 -0700" }, "message": "sched: Fix race in task_group()\n\ncommit 8323f26ce3425460769605a6aece7a174edaa7d1 upstream.\n\nStefan reported a crash on a kernel before a3e5d1091c1 (\"sched:\nDon\u0027t call task_group() too many times in set_task_rq()\"), he\nfound the reason to be that the multiple task_group()\ninvocations in set_task_rq() returned different values.\n\nLooking at all that I found a lack of serialization and plain\nwrong comments.\n\nThe below tries to fix it using an extra pointer which is\nupdated under the appropriate scheduler locks. Its not pretty,\nbut I can\u0027t really see another way given how all the cgroup\nstuff works.\n\nReported-and-tested-by: Stefan Bader \u003cstefan.bader@canonical.com\u003e\nSigned-off-by: Peter Zijlstra \u003ca.p.zijlstra@chello.nl\u003e\nLink: http://lkml.kernel.org/r/1340364965.18025.71.camel@twins\nSigned-off-by: Ingo Molnar \u003cmingo@kernel.org\u003e\nSigned-off-by: Greg Kroah-Hartman \u003cgregkh@linuxfoundation.org\u003e\n\n" }, { "commit": "7490d0a4cfefa16f9d8ce636eb5b2e13d2432db3", "tree": "70ee2418549bd1af674a7bda391140a45a5e11ce", "parents": [ "667fb5508900340d657645e0bfc9bf210a1fc363" ], "author": { "name": "Peter Zijlstra", "email": "a.p.zijlstra@chello.nl", "time": "Fri Jun 22 15:52:09 2012 +0200" }, "committer": { "name": "Greg Kroah-Hartman", "email": "gregkh@linuxfoundation.org", "time": "Thu Jul 19 08:58:56 2012 -0700" }, "message": "sched/nohz: Rewrite and fix load-avg computation -- again\n\ncommit 5167e8d5417bf5c322a703d2927daec727ea40dd upstream.\n\nThanks to Charles Wang for spotting the defects in the current code:\n\n - If we go idle during the sample window -- after sampling, we get a\n negative bias because we can negate our own sample.\n\n - If we wake up during the sample window we get a positive bias\n because we push the sample to a known active period.\n\nSo rewrite the entire nohz load-avg muck once again, now adding\ncopious documentation to the code.\n\nReported-and-tested-by: Doug Smythies \u003cdsmythies@telus.net\u003e\nReported-and-tested-by: Charles Wang \u003cmuming.wq@gmail.com\u003e\nSigned-off-by: Peter Zijlstra \u003ca.p.zijlstra@chello.nl\u003e\nCc: Linus Torvalds \u003ctorvalds@linux-foundation.org\u003e\nCc: Andrew Morton \u003cakpm@linux-foundation.org\u003e\nLink: http://lkml.kernel.org/r/1340373782.18025.74.camel@twins\n[ minor edits ]\nSigned-off-by: Ingo Molnar \u003cmingo@kernel.org\u003e\nSigned-off-by: Greg Kroah-Hartman \u003cgregkh@linuxfoundation.org\u003e\n\n" }, { "commit": "897672e9ff884e2d3bb6cca9d29417e042a0fb17", "tree": "efb78144e682ff6d8a5bbe1d99e39e739673a296", "parents": [ "ff3ab81c21478c6aa1ad1c1c05c188051b57ed64" ], "author": { "name": "San Mehat", "email": "san@google.com", "time": "Thu May 06 15:37:55 2010 -0700" }, "committer": { "name": "Colin Cross", "email": "ccross@android.com", "time": "Mon Apr 09 13:57:50 2012 -0700" }, "message": "sched: Add a generic notifier when a task struct is about to be freed\n\nThis patch adds a notifier which can be used by subsystems that may\nbe interested in when a task has completely died and is about to\nhave it\u0027s last resource freed.\n\n The Android lowmemory killer uses this to determine when a task\nit has killed has finally given up its goods.\n\nSigned-off-by: San Mehat \u003csan@google.com\u003e\n" }, { "commit": "0195c00244dc2e9f522475868fa278c473ba7339", "tree": "f97ca98ae64ede2c33ad3de05ed7bbfa4f4495ed", "parents": [ "f21ce8f8447c8be8847dadcfdbcc76b0d7365fa5", "141124c02059eee9dbc5c86ea797b1ca888e77f7" ], "author": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Wed Mar 28 15:58:21 2012 -0700" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Wed Mar 28 15:58:21 2012 -0700" }, "message": "Merge tag \u0027split-asm_system_h-for-linus-20120328\u0027 of git://git.kernel.org/pub/scm/linux/kernel/git/dhowells/linux-asm_system\n\nPull \"Disintegrate and delete asm/system.h\" from David Howells:\n \"Here are a bunch of patches to disintegrate asm/system.h into a set of\n separate bits to relieve the problem of circular inclusion\n dependencies.\n\n I\u0027ve built all the working defconfigs from all the arches that I can\n and made sure that they don\u0027t break.\n\n The reason for these patches is that I recently encountered a circular\n dependency problem that came about when I produced some patches to\n optimise get_order() by rewriting it to use ilog2().\n\n This uses bitops - and on the SH arch asm/bitops.h drags in\n asm-generic/get_order.h by a circuituous route involving asm/system.h.\n\n The main difficulty seems to be asm/system.h. It holds a number of\n low level bits with no/few dependencies that are commonly used (eg.\n memory barriers) and a number of bits with more dependencies that\n aren\u0027t used in many places (eg. switch_to()).\n\n These patches break asm/system.h up into the following core pieces:\n\n (1) asm/barrier.h\n\n Move memory barriers here. This already done for MIPS and Alpha.\n\n (2) asm/switch_to.h\n\n Move switch_to() and related stuff here.\n\n (3) asm/exec.h\n\n Move arch_align_stack() here. Other process execution related bits\n could perhaps go here from asm/processor.h.\n\n (4) asm/cmpxchg.h\n\n Move xchg() and cmpxchg() here as they\u0027re full word atomic ops and\n frequently used by atomic_xchg() and atomic_cmpxchg().\n\n (5) asm/bug.h\n\n Move die() and related bits.\n\n (6) asm/auxvec.h\n\n Move AT_VECTOR_SIZE_ARCH here.\n\n Other arch headers are created as needed on a per-arch basis.\"\n\nFixed up some conflicts from other header file cleanups and moving code\naround that has happened in the meantime, so David\u0027s testing is somewhat\nweakened by that. We\u0027ll find out anything that got broken and fix it..\n\n* tag \u0027split-asm_system_h-for-linus-20120328\u0027 of git://git.kernel.org/pub/scm/linux/kernel/git/dhowells/linux-asm_system: (38 commits)\n Delete all instances of asm/system.h\n Remove all #inclusions of asm/system.h\n Add #includes needed to permit the removal of asm/system.h\n Move all declarations of free_initmem() to linux/mm.h\n Disintegrate asm/system.h for OpenRISC\n Split arch_align_stack() out from asm-generic/system.h\n Split the switch_to() wrapper out of asm-generic/system.h\n Move the asm-generic/system.h xchg() implementation to asm-generic/cmpxchg.h\n Create asm-generic/barrier.h\n Make asm-generic/cmpxchg.h #include asm-generic/cmpxchg-local.h\n Disintegrate asm/system.h for Xtensa\n Disintegrate asm/system.h for Unicore32 [based on ver #3, changed by gxt]\n Disintegrate asm/system.h for Tile\n Disintegrate asm/system.h for Sparc\n Disintegrate asm/system.h for SH\n Disintegrate asm/system.h for Score\n Disintegrate asm/system.h for S390\n Disintegrate asm/system.h for PowerPC\n Disintegrate asm/system.h for PA-RISC\n Disintegrate asm/system.h for MN10300\n ...\n" }, { "commit": "9ffc93f203c18a70623f21950f1dd473c9ec48cd", "tree": "1eb3536ae183b0bfbf7f5152a6fe4f430ae881c2", "parents": [ "96f951edb1f1bdbbc99b0cd458f9808bb83d58ae" ], "author": { "name": "David Howells", "email": "dhowells@redhat.com", "time": "Wed Mar 28 18:30:03 2012 +0100" }, "committer": { "name": "David Howells", "email": "dhowells@redhat.com", "time": "Wed Mar 28 18:30:03 2012 +0100" }, "message": "Remove all #inclusions of asm/system.h\n\nRemove all #inclusions of asm/system.h preparatory to splitting and killing\nit. Performed with the following command:\n\nperl -p -i -e \u0027s!^#\\s*include\\s*\u003casm/system[.]h\u003e.*\\n!!\u0027 `grep -Irl \u0027^#\\s*include\\s*\u003casm/system[.]h\u003e\u0027 *`\n\nSigned-off-by: David Howells \u003cdhowells@redhat.com\u003e\n" }, { "commit": "ebec18a6d3aa1e7d84aab16225e87fd25170ec2b", "tree": "fd329dcd5173c252fc7aed64cab9c2a51575dcec", "parents": [ "953326cb60c1dff1bd3458d6468d16d75f2bcd61" ], "author": { "name": "Lennart Poettering", "email": "lennart@poettering.net", "time": "Fri Mar 23 15:01:54 2012 -0700" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Fri Mar 23 16:58:32 2012 -0700" }, "message": "prctl: add PR_{SET,GET}_CHILD_SUBREAPER to allow simple process supervision\n\nUserspace service managers/supervisors need to track their started\nservices. Many services daemonize by double-forking and get implicitly\nre-parented to PID 1. The service manager will no longer be able to\nreceive the SIGCHLD signals for them, and is no longer in charge of\nreaping the children with wait(). All information about the children is\nlost at the moment PID 1 cleans up the re-parented processes.\n\nWith this prctl, a service manager process can mark itself as a sort of\n\u0027sub-init\u0027, able to stay as the parent for all orphaned processes\ncreated by the started services. All SIGCHLD signals will be delivered\nto the service manager.\n\nReceiving SIGCHLD and doing wait() is in cases of a service-manager much\npreferred over any possible asynchronous notification about specific\nPIDs, because the service manager has full access to the child process\ndata in /proc and the PID can not be re-used until the wait(), the\nservice-manager itself is in charge of, has happened.\n\nAs a side effect, the relevant parent PID information does not get lost\nby a double-fork, which results in a more elaborate process tree and\n\u0027ps\u0027 output:\n\nbefore:\n # ps afx\n 253 ? Ss 0:00 /bin/dbus-daemon --system --nofork\n 294 ? Sl 0:00 /usr/libexec/polkit-1/polkitd\n 328 ? S 0:00 /usr/sbin/modem-manager\n 608 ? Sl 0:00 /usr/libexec/colord\n 658 ? Sl 0:00 /usr/libexec/upowerd\n 819 ? Sl 0:00 /usr/libexec/imsettings-daemon\n 916 ? Sl 0:00 /usr/libexec/udisks-daemon\n 917 ? S 0:00 \\_ udisks-daemon: not polling any devices\n\nafter:\n # ps afx\n 294 ? Ss 0:00 /bin/dbus-daemon --system --nofork\n 426 ? Sl 0:00 \\_ /usr/libexec/polkit-1/polkitd\n 449 ? S 0:00 \\_ /usr/sbin/modem-manager\n 635 ? Sl 0:00 \\_ /usr/libexec/colord\n 705 ? Sl 0:00 \\_ /usr/libexec/upowerd\n 959 ? Sl 0:00 \\_ /usr/libexec/udisks-daemon\n 960 ? S 0:00 | \\_ udisks-daemon: not polling any devices\n 977 ? Sl 0:00 \\_ /usr/libexec/packagekitd\n\nThis prctl is orthogonal to PID namespaces. PID namespaces are isolated\nfrom each other, while a service management process usually requires the\nservices to live in the same namespace, to be able to talk to each\nother.\n\nUsers of this will be the systemd per-user instance, which provides\ninit-like functionality for the user\u0027s login session and D-Bus, which\nactivates bus services on-demand. Both need init-like capabilities to\nbe able to properly keep track of the services they start.\n\nMany thanks to Oleg for several rounds of review and insights.\n\n[akpm@linux-foundation.org: fix comment layout and spelling]\n[akpm@linux-foundation.org: add lengthy code comment from Oleg]\nReviewed-by: Oleg Nesterov \u003coleg@redhat.com\u003e\nSigned-off-by: Lennart Poettering \u003clennart@poettering.net\u003e\nSigned-off-by: Kay Sievers \u003ckay.sievers@vrfy.org\u003e\nAcked-by: Valdis Kletnieks \u003cValdis.Kletnieks@vt.edu\u003e\nSigned-off-by: Andrew Morton \u003cakpm@linux-foundation.org\u003e\nSigned-off-by: Linus Torvalds \u003ctorvalds@linux-foundation.org\u003e\n" }, { "commit": "cc9a6c8776615f9c194ccf0b63a0aa5628235545", "tree": "0cbbf118e86541f8eb2fc7b717a0e08eaced986d", "parents": [ "e845e199362cc5712ba0e7eedc14eed70e144258" ], "author": { "name": "Mel Gorman", "email": "mgorman@suse.de", "time": "Wed Mar 21 16:34:11 2012 -0700" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Wed Mar 21 17:54:59 2012 -0700" }, "message": "cpuset: mm: reduce large amounts of memory barrier related damage v3\n\nCommit c0ff7453bb5c (\"cpuset,mm: fix no node to alloc memory when\nchanging cpuset\u0027s mems\") wins a super prize for the largest number of\nmemory barriers entered into fast paths for one commit.\n\n[get|put]_mems_allowed is incredibly heavy with pairs of full memory\nbarriers inserted into a number of hot paths. This was detected while\ninvestigating at large page allocator slowdown introduced some time\nafter 2.6.32. The largest portion of this overhead was shown by\noprofile to be at an mfence introduced by this commit into the page\nallocator hot path.\n\nFor extra style points, the commit introduced the use of yield() in an\nimplementation of what looks like a spinning mutex.\n\nThis patch replaces the full memory barriers on both read and write\nsides with a sequence counter with just read barriers on the fast path\nside. This is much cheaper on some architectures, including x86. The\nmain bulk of the patch is the retry logic if the nodemask changes in a\nmanner that can cause a false failure.\n\nWhile updating the nodemask, a check is made to see if a false failure\nis a risk. If it is, the sequence number gets bumped and parallel\nallocators will briefly stall while the nodemask update takes place.\n\nIn a page fault test microbenchmark, oprofile samples from\n__alloc_pages_nodemask went from 4.53% of all samples to 1.15%. The\nactual results were\n\n 3.3.0-rc3 3.3.0-rc3\n rc3-vanilla nobarrier-v2r1\n Clients 1 UserTime 0.07 ( 0.00%) 0.08 (-14.19%)\n Clients 2 UserTime 0.07 ( 0.00%) 0.07 ( 2.72%)\n Clients 4 UserTime 0.08 ( 0.00%) 0.07 ( 3.29%)\n Clients 1 SysTime 0.70 ( 0.00%) 0.65 ( 6.65%)\n Clients 2 SysTime 0.85 ( 0.00%) 0.82 ( 3.65%)\n Clients 4 SysTime 1.41 ( 0.00%) 1.41 ( 0.32%)\n Clients 1 WallTime 0.77 ( 0.00%) 0.74 ( 4.19%)\n Clients 2 WallTime 0.47 ( 0.00%) 0.45 ( 3.73%)\n Clients 4 WallTime 0.38 ( 0.00%) 0.37 ( 1.58%)\n Clients 1 Flt/sec/cpu 497620.28 ( 0.00%) 520294.53 ( 4.56%)\n Clients 2 Flt/sec/cpu 414639.05 ( 0.00%) 429882.01 ( 3.68%)\n Clients 4 Flt/sec/cpu 257959.16 ( 0.00%) 258761.48 ( 0.31%)\n Clients 1 Flt/sec 495161.39 ( 0.00%) 517292.87 ( 4.47%)\n Clients 2 Flt/sec 820325.95 ( 0.00%) 850289.77 ( 3.65%)\n Clients 4 Flt/sec 1020068.93 ( 0.00%) 1022674.06 ( 0.26%)\n MMTests Statistics: duration\n Sys Time Running Test (seconds) 135.68 132.17\n User+Sys Time Running Test (seconds) 164.2 160.13\n Total Elapsed Time (seconds) 123.46 120.87\n\nThe overall improvement is small but the System CPU time is much\nimproved and roughly in correlation to what oprofile reported (these\nperformance figures are without profiling so skew is expected). The\nactual number of page faults is noticeably improved.\n\nFor benchmarks like kernel builds, the overall benefit is marginal but\nthe system CPU time is slightly reduced.\n\nTo test the actual bug the commit fixed I opened two terminals. The\nfirst ran within a cpuset and continually ran a small program that\nfaulted 100M of anonymous data. In a second window, the nodemask of the\ncpuset was continually randomised in a loop.\n\nWithout the commit, the program would fail every so often (usually\nwithin 10 seconds) and obviously with the commit everything worked fine.\nWith this patch applied, it also worked fine so the fix should be\nfunctionally equivalent.\n\nSigned-off-by: Mel Gorman \u003cmgorman@suse.de\u003e\nCc: Miao Xie \u003cmiaox@cn.fujitsu.com\u003e\nCc: David Rientjes \u003crientjes@google.com\u003e\nCc: Peter Zijlstra \u003ca.p.zijlstra@chello.nl\u003e\nCc: Christoph Lameter \u003ccl@linux.com\u003e\nSigned-off-by: Andrew Morton \u003cakpm@linux-foundation.org\u003e\nSigned-off-by: Linus Torvalds \u003ctorvalds@linux-foundation.org\u003e\n" }, { "commit": "2ba68940c893c8f0bfc8573c041254251bb6aeab", "tree": "fa83ebb01d32abd98123fa28f9f6f0b3eaeee25d", "parents": [ "9c2b957db1772ebf942ae7a9346b14eba6c8ca66", "600e145882802d6ccbfe2c4aea243d97caeb91a9" ], "author": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Tue Mar 20 10:31:44 2012 -0700" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Tue Mar 20 10:31:44 2012 -0700" }, "message": "Merge branch \u0027sched-core-for-linus\u0027 of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip\n\nPull scheduler changes for v3.4 from Ingo Molnar\n\n* \u0027sched-core-for-linus\u0027 of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: (27 commits)\n printk: Make it compile with !CONFIG_PRINTK\n sched/x86: Fix overflow in cyc2ns_offset\n sched: Fix nohz load accounting -- again!\n sched: Update yield() docs\n printk/sched: Introduce special printk_sched() for those awkward moments\n sched/nohz: Correctly initialize \u0027next_balance\u0027 in \u0027nohz\u0027 idle balancer\n sched: Cleanup cpu_active madness\n sched: Fix load-balance wreckage\n sched: Clean up parameter passing of proc_sched_autogroup_set_nice()\n sched: Ditch per cgroup task lists for load-balancing\n sched: Rename load-balancing fields\n sched: Move load-balancing arguments into helper struct\n sched/rt: Do not submit new work when PI-blocked\n sched/rt: Prevent idle task boosting\n sched/wait: Add __wake_up_all_locked() API\n sched/rt: Document scheduler related skip-resched-check sites\n sched/rt: Use schedule_preempt_disabled()\n sched/rt: Add schedule_preempt_disabled()\n sched/rt: Do not throttle when PI boosting\n sched/rt: Keep period timer ticking when rt throttling is active\n ...\n" }, { "commit": "0bbfcaff9b2a69c71a95e6902253487ab30cb498", "tree": "f422bbfb8ba57909bf6e43f1d560b3f056cc3c61", "parents": [ "5928a2b60cfdbad730f93696acab142d0b607280", "e04268b0effc0ceea366c50b3107baad9edadafa" ], "author": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Tue Mar 20 10:28:56 2012 -0700" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Tue Mar 20 10:28:56 2012 -0700" }, "message": "Merge branch \u0027irq-core-for-linus\u0027 of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip\n\nPull irq/core changes for v3.4 from Ingo Molnar\n\n* \u0027irq-core-for-linus\u0027 of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:\n genirq: Remove paranoid warnons and bogus fixups\n genirq: Flush the irq thread on synchronization\n genirq: Get rid of unnecessary IRQTF_DIED flag\n genirq: No need to check IRQTF_DIED before stopping a thread handler\n genirq: Get rid of unnecessary irqaction field in task_struct\n genirq: Fix incorrect check for forced IRQ thread handler\n softirq: Reduce invoke_softirq() code duplication\n genirq: Fix long-term regression in genirq irq_set_irq_type() handling\n x86-32/irq: Don\u0027t switch to irq stack for a user-mode irq\n" }, { "commit": "5928a2b60cfdbad730f93696acab142d0b607280", "tree": "49bb21c9219673e61bad7a7c9202c7f25f5fe1be", "parents": [ "5ed59af85077d28875a3a137b21933aaf1b4cd50", "bdd4431c8d071491a68a65d9457996f222b5ecd3" ], "author": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Mon Mar 19 17:12:34 2012 -0700" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Tue Mar 20 10:10:18 2012 -0700" }, "message": "Merge branch \u0027core-rcu-for-linus\u0027 of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip\n\nPull RCU changes for v3.4 from Ingo Molnar. The major features of this\nseries are:\n\n - making RCU more aggressive about entering dyntick-idle mode in order\n to improve energy efficiency\n\n - converting a few more call_rcu()s to kfree_rcu()s\n\n - applying a number of rcutree fixes and cleanups to rcutiny\n\n - removing CONFIG_SMP #ifdefs from treercu\n\n - allowing RCU CPU stall times to be set via sysfs\n\n - adding CPU-stall capability to rcutorture\n\n - adding more RCU-abuse diagnostics\n\n - updating documentation\n\n - fixing yet more issues located by the still-ongoing top-to-bottom\n inspection of RCU, this time with a special focus on the CPU-hotplug\n code path.\n\n* \u0027core-rcu-for-linus\u0027 of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: (48 commits)\n rcu: Stop spurious warnings from synchronize_sched_expedited\n rcu: Hold off RCU_FAST_NO_HZ after timer posted\n rcu: Eliminate softirq-mediated RCU_FAST_NO_HZ idle-entry loop\n rcu: Add RCU_NONIDLE() for idle-loop RCU read-side critical sections\n rcu: Allow nesting of rcu_idle_enter() and rcu_idle_exit()\n rcu: Remove redundant check for rcu_head misalignment\n PTR_ERR should be called before its argument is cleared.\n rcu: Convert WARN_ON_ONCE() in rcu_lock_acquire() to lockdep\n rcu: Trace only after NULL-pointer check\n rcu: Call out dangers of expedited RCU primitives\n rcu: Rework detection of use of RCU by offline CPUs\n lockdep: Add CPU-idle/offline warning to lockdep-RCU splat\n rcu: No interrupt disabling for rcu_prepare_for_idle()\n rcu: Move synchronize_sched_expedited() to rcutree.c\n rcu: Check for illegal use of RCU from offlined CPUs\n rcu: Update stall-warning documentation\n rcu: Add CPU-stall capability to rcutorture\n rcu: Make documentation give more realistic rcutorture duration\n rcutorture: Permit holding off CPU-hotplug operations during boot\n rcu: Print scheduling-clock information on RCU CPU stall-warning messages\n ...\n" }, { "commit": "df8d291f28aa1e8437c8f7816328a6516379c71b", "tree": "26ae585aa259584ddd0d9088933547c065c37086", "parents": [ "5234ffb9f74cfa8993d174782bc861dd9b7b5bfb", "fde7d9049e55ab85a390be7f415d74c9f62dd0f9" ], "author": { "name": "Thomas Gleixner", "email": "tglx@linutronix.de", "time": "Tue Mar 13 16:34:48 2012 +0100" }, "committer": { "name": "Thomas Gleixner", "email": "tglx@linutronix.de", "time": "Tue Mar 13 16:35:16 2012 +0100" }, "message": "Merge branch \u0027linus\u0027 into irq/core\n\nReason: Get upstream fixes integrated before further modifications.\n\nSigned-off-by: Thomas Gleixner \u003ctglx@linutronix.de\u003e\n" }, { "commit": "47258cf3c4aa5d56e678bafe0dd0d03ddd980b88", "tree": "4856f0fb1185ba97f320a7ed6fb63bf136708a42", "parents": [ "c308b56b5398779cd3da0f62ab26b0453494c3d4", "fde7d9049e55ab85a390be7f415d74c9f62dd0f9" ], "author": { "name": "Ingo Molnar", "email": "mingo@elte.hu", "time": "Tue Mar 13 16:26:52 2012 +0100" }, "committer": { "name": "Ingo Molnar", "email": "mingo@elte.hu", "time": "Tue Mar 13 16:26:52 2012 +0100" }, "message": "Merge tag \u0027v3.3-rc7\u0027 into sched/core\n\nMerge reason: merge back final fixes, prepare for the merge window.\n\nSigned-off-by: Ingo Molnar \u003cmingo@elte.hu\u003e\n" }, { "commit": "4bcdf1d0b652bc33d52f2322b77463e4dc58abf8", "tree": "2a8ecf0f6ef1d0c85a4553cb1d1c7dc74706488a", "parents": [ "540b60e24f3f4781d80e47122f0c4486a03375b8" ], "author": { "name": "Alexander Gordeev", "email": "agordeev@redhat.com", "time": "Fri Mar 09 14:59:26 2012 +0100" }, "committer": { "name": "Thomas Gleixner", "email": "tglx@linutronix.de", "time": "Fri Mar 09 17:19:08 2012 +0100" }, "message": "genirq: Get rid of unnecessary irqaction field in task_struct\n\nWhen a new thread handler is created, an irqaction is passed to it as\ndata. Not only that irqaction is stored in task_struct by the handler\nfor later use, but also a structure associated with the kernel thread\nkeeps this value as long as the thread exists.\n\nThis fix kicks irqaction out off task_struct. Yes, I introduce new bit\nfield. But it allows not only to eliminate the duplicate, but also\nshortens size of task_struct.\n\nReported-by: Oleg Nesterov \u003coleg@redhat.com\u003e\nSigned-off-by: Alexander Gordeev \u003cagordeev@redhat.com\u003e\nLink: http://lkml.kernel.org/r/20120309135925.GB2114@dhcp-26-207.brq.redhat.com\nSigned-off-by: Thomas Gleixner \u003ctglx@linutronix.de\u003e\n" }, { "commit": "6e27f63edbd7ab893258e16500171dd1270a1369", "tree": "9c61b7c0dda37052e2285e90f914f8af5ed86f67", "parents": [ "57b59c4a1400fa6c34764eab2e35a8762dc05a09" ], "author": { "name": "Oleg Nesterov", "email": "oleg@redhat.com", "time": "Mon Mar 05 14:59:14 2012 -0800" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Mon Mar 05 15:49:42 2012 -0800" }, "message": "vfork: kill PF_STARTING\n\nPreviously it was (ab)used by utrace. Then it was wrongly used by the\nscheduler code.\n\nCurrently it is not used, kill it before it finds the new erroneous user.\n\nSigned-off-by: Oleg Nesterov \u003coleg@redhat.com\u003e\nAcked-by: Tejun Heo \u003ctj@kernel.org\u003e\nSigned-off-by: Andrew Morton \u003cakpm@linux-foundation.org\u003e\nSigned-off-by: Linus Torvalds \u003ctorvalds@linux-foundation.org\u003e\n" }, { "commit": "57b59c4a1400fa6c34764eab2e35a8762dc05a09", "tree": "e50e6a6f9f7fcd897856e5cdaca3d3caa18377d6", "parents": [ "d68b46fe16ad59b3a5f51ec73daaa5dc06753798" ], "author": { "name": "Oleg Nesterov", "email": "oleg@redhat.com", "time": "Mon Mar 05 14:59:13 2012 -0800" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Mon Mar 05 15:49:42 2012 -0800" }, "message": "coredump_wait: don\u0027t call complete_vfork_done()\n\nNow that CLONE_VFORK is killable, coredump_wait() no longer needs\ncomplete_vfork_done(). zap_threads() should find and kill all tasks with\nthe same -\u003emm, this includes our parent if -\u003evfork_done is set.\n\nmm_release() becomes the only caller, unexport complete_vfork_done().\n\nSigned-off-by: Oleg Nesterov \u003coleg@redhat.com\u003e\nAcked-by: Tejun Heo \u003ctj@kernel.org\u003e\nSigned-off-by: Andrew Morton \u003cakpm@linux-foundation.org\u003e\nSigned-off-by: Linus Torvalds \u003ctorvalds@linux-foundation.org\u003e\n" }, { "commit": "d68b46fe16ad59b3a5f51ec73daaa5dc06753798", "tree": "4bae9ddc5f5bed853d1f0936d05c30e4f7ca924d", "parents": [ "c415c3b47ea2754659d915cca387a20999044163" ], "author": { "name": "Oleg Nesterov", "email": "oleg@redhat.com", "time": "Mon Mar 05 14:59:13 2012 -0800" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Mon Mar 05 15:49:42 2012 -0800" }, "message": "vfork: make it killable\n\nMake vfork() killable.\n\nChange do_fork(CLONE_VFORK) to do wait_for_completion_killable(). If it\nfails we do not return to the user-mode and never touch the memory shared\nwith our child.\n\nHowever, in this case we should clear child-\u003evfork_done before return, we\nuse task_lock() in do_fork()-\u003ewait_for_vfork_done() and\ncomplete_vfork_done() to serialize with each other.\n\nNote: now that we use task_lock() we don\u0027t really need completion, we\ncould turn task-\u003evfork_done into \"task_struct *wake_up_me\" but this needs\nsome complications.\n\nNOTE: this and the next patches do not affect in-kernel users of\nCLONE_VFORK, kernel threads run with all signals ignored including\nSIGKILL/SIGSTOP.\n\nHowever this is obviously the user-visible change. Not only a fatal\nsignal can kill the vforking parent, a sub-thread can do execve or\nexit_group() and kill the thread sleeping in vfork().\n\nSigned-off-by: Oleg Nesterov \u003coleg@redhat.com\u003e\nAcked-by: Tejun Heo \u003ctj@kernel.org\u003e\nSigned-off-by: Andrew Morton \u003cakpm@linux-foundation.org\u003e\nSigned-off-by: Linus Torvalds \u003ctorvalds@linux-foundation.org\u003e\n" }, { "commit": "c415c3b47ea2754659d915cca387a20999044163", "tree": "c2cb1134f139702e06ade8aecbeff70be7ea727c", "parents": [ "880641bb9da2473e9ecf6c708d993b29928c1b3c" ], "author": { "name": "Oleg Nesterov", "email": "oleg@redhat.com", "time": "Mon Mar 05 14:59:13 2012 -0800" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Mon Mar 05 15:49:42 2012 -0800" }, "message": "vfork: introduce complete_vfork_done()\n\nNo functional changes.\n\nMove the clear-and-complete-vfork_done code into the new trivial helper,\ncomplete_vfork_done().\n\nSigned-off-by: Oleg Nesterov \u003coleg@redhat.com\u003e\nAcked-by: Tejun Heo \u003ctj@kernel.org\u003e\nSigned-off-by: Andrew Morton \u003cakpm@linux-foundation.org\u003e\nSigned-off-by: Linus Torvalds \u003ctorvalds@linux-foundation.org\u003e\n" }, { "commit": "2e5b5b3a1b7768c89fbfeca18e75f8ee377e924c", "tree": "0d6d589e42b7e88464d5edcfa818b3a7e27a93e8", "parents": [ "367456c756a6b84f493ca9cc5b17b1f5d38ef466" ], "author": { "name": "Hiroshi Shimamoto", "email": "h-shimamoto@ct.jp.nec.com", "time": "Thu Feb 23 17:41:27 2012 +0900" }, "committer": { "name": "Ingo Molnar", "email": "mingo@elte.hu", "time": "Fri Mar 02 12:23:49 2012 +0100" }, "message": "sched: Clean up parameter passing of proc_sched_autogroup_set_nice()\n\nPass nice as a value to proc_sched_autogroup_set_nice().\n\nNo side effect is expected, and the variable err will be overwritten with\nthe return value.\n\nSigned-off-by: Hiroshi Shimamoto \u003ch-shimamoto@ct.jp.nec.com\u003e\nSigned-off-by: Peter Zijlstra \u003ca.p.zijlstra@chello.nl\u003e\nLink: http://lkml.kernel.org/r/4F45FBB7.5090607@ct.jp.nec.com\nSigned-off-by: Ingo Molnar \u003cmingo@elte.hu\u003e\n" }, { "commit": "3c7d51843b03a6839e9ec7cda724e54d2319a63a", "tree": "df8ac53451a7e519ddb0d349b24e6ba17ea18afb", "parents": [ "1c4dd99bed5f6f70932bf8dacdd54d04a2619778" ], "author": { "name": "Thomas Gleixner", "email": "tglx@linutronix.de", "time": "Sun Jul 17 20:46:52 2011 +0200" }, "committer": { "name": "Ingo Molnar", "email": "mingo@elte.hu", "time": "Thu Mar 01 10:46:54 2012 +0100" }, "message": "sched/rt: Do not submit new work when PI-blocked\n\nWhen we are PI-blocked then we want to get things done ASAP.\n\nSigned-off-by: Thomas Gleixner \u003ctglx@linutronix.de\u003e\nAcked-by: Peter Zijlstra \u003ca.p.zijlstra@chello.nl\u003e\nLink: http://lkml.kernel.org/n/tip-vw8et3445km5b8mpihf4trae@git.kernel.org\nSigned-off-by: Ingo Molnar \u003cmingo@elte.hu\u003e\n" }, { "commit": "c5491ea779793f977d282754db478157cc409d82", "tree": "c110f80101e9e513f5a6f1d2ba81b2934c2408f6", "parents": [ "7abc63b1bd412f7655b62ef3e35c3c11c5134636" ], "author": { "name": "Thomas Gleixner", "email": "tglx@linutronix.de", "time": "Mon Mar 21 12:09:35 2011 +0100" }, "committer": { "name": "Ingo Molnar", "email": "mingo@elte.hu", "time": "Thu Mar 01 10:28:03 2012 +0100" }, "message": "sched/rt: Add schedule_preempt_disabled()\n\nAdd helper to get rid of the ever repeating:\n\n preempt_enable_no_resched();\n schedule();\n preempt_disable();\n\npatterns.\n\nSigned-off-by: Thomas Gleixner \u003ctglx@linutronix.de\u003e\nAcked-by: Peter Zijlstra \u003ca.p.zijlstra@chello.nl\u003e\nLink: http://lkml.kernel.org/n/tip-wxx7btox7coby6ifv5vzhzgp@git.kernel.org\nSigned-off-by: Ingo Molnar \u003cmingo@elte.hu\u003e\n" }, { "commit": "7e4d960993331e92567f0180e45322a93e6780ba", "tree": "4d7444035303fc0b545e88afbd894176344fb2a3", "parents": [ "de5bdff7a72acc281219be2b8edeeca1fd81c542", "164974a8f2a482f1abcb027c6d1a89dd79b14297" ], "author": { "name": "Ingo Molnar", "email": "mingo@elte.hu", "time": "Thu Mar 01 10:26:41 2012 +0100" }, "committer": { "name": "Ingo Molnar", "email": "mingo@elte.hu", "time": "Thu Mar 01 10:26:43 2012 +0100" }, "message": "Merge branch \u0027linus\u0027 into sched/core\n\nMerge reason: we\u0027ll queue up dependent patches.\n\nSigned-off-by: Ingo Molnar \u003cmingo@elte.hu\u003e\n" }, { "commit": "de5bdff7a72acc281219be2b8edeeca1fd81c542", "tree": "6a528beb1852e2fd7d444b47e8b4cc6e6be31108", "parents": [ "62f6536a630affe3176deb48554d27ee58b65077" ], "author": { "name": "Hiroshi Shimamoto", "email": "h-shimamoto@ct.jp.nec.com", "time": "Thu Feb 16 14:52:21 2012 +0900" }, "committer": { "name": "Ingo Molnar", "email": "mingo@elte.hu", "time": "Wed Feb 22 12:28:29 2012 +0100" }, "message": "sched: Make initial SCHED_RR timeslace DEF_TIMESLICE\n\nCurrent the initial SCHED_RR timeslice of init_task is HZ, which means\n1s, and is not same as the default SCHED_RR timeslice DEF_TIMESLICE.\n\nChange that initial timeslice to the DEF_TIMESLICE.\n\nSigned-off-by: Hiroshi Shimamoto \u003ch-shimamoto@ct.jp.nec.com\u003e\n[ s/DEF_TIMESLICE/RR_TIMESLICE/g ]\nSigned-off-by: Peter Zijlstra \u003ca.p.zijlstra@chello.nl\u003e\nLink: http://lkml.kernel.org/r/4F3C9995.3010800@ct.jp.nec.com\nSigned-off-by: Ingo Molnar \u003cmingo@elte.hu\u003e\n" }, { "commit": "1aa03f1188f7b0b85df2de602b33ee7b6fab8e00", "tree": "20ee8fc1aa5bccc8d8cf53c705d9cc766058eaf5", "parents": [ "8762705ad4ac860bb78434409df463d02ac8f027" ], "author": { "name": "Paul E. McKenney", "email": "paul.mckenney@linaro.org", "time": "Wed Jan 11 17:25:17 2012 -0800" }, "committer": { "name": "Paul E. McKenney", "email": "paulmck@linux.vnet.ibm.com", "time": "Tue Feb 21 09:03:43 2012 -0800" }, "message": "rcu: Simplify unboosting checks\n\nThis is a port of commit #82e78d80 from TREE_PREEMPT_RCU to\nTINY_PREEMPT_RCU.\n\nThis commit uses the fact that current-\u003ercu_boost_mutex is set\nany time that the RCU_READ_UNLOCK_BOOSTED flag is set in the\ncurrent-\u003ercu_read_unlock_special bitmask. This allows tests of\nthe bit to be changed to tests of the pointer, which in turn allows\nthe RCU_READ_UNLOCK_BOOSTED flag to be eliminated.\n\nPlease note that the check of current-\u003ercu_read_unlock_special need not\nchange because any time that RCU_READ_UNLOCK_BOOSTED was set, so was\nRCU_READ_UNLOCK_BLOCKED. Therefore, __rcu_read_unlock() can continue\ntesting current-\u003ercu_read_unlock_special for non-zero, as before.\n\nSigned-off-by: Paul E. McKenney \u003cpaul.mckenney@linaro.org\u003e\nSigned-off-by: Paul E. McKenney \u003cpaulmck@linux.vnet.ibm.com\u003e\n" }, { "commit": "9388dc3047a88bedfd867e9ba3e1980c815ac524", "tree": "50f30a41607c270b00c04644e069f165a456310a", "parents": [ "ed387b781ea6e14b78f449aa2ee4f270b60b01ac" ], "author": { "name": "Anton Vorontsov", "email": "anton.vorontsov@linaro.org", "time": "Thu Feb 09 20:45:19 2012 +0400" }, "committer": { "name": "Ingo Molnar", "email": "mingo@elte.hu", "time": "Sat Feb 11 15:41:33 2012 +0100" }, "message": "sched: Turn lock_task_sighand() into a static inline\n\nIt appears that sparse tool understands static inline functions\nfor context balance checking, so let\u0027s turn the macros into an\ninline func.\n\nThis makes the code a little bit more robust.\n\nSuggested-by: Oleg Nesterov \u003coleg@redhat.com\u003e\nSigned-off-by: Anton Vorontsov \u003canton.vorontsov@linaro.org\u003e\nCc: KOSAKI Motohiro \u003ckosaki.motohiro@gmail.com\u003e\nCc: Greg KH \u003cgregkh@linuxfoundation.org\u003e\nCc: Arve \u003carve@android.com\u003e\nCc: San Mehat \u003csan@google.com\u003e\nCc: Colin Cross \u003cccross@android.com\u003e\nCc: Eric W. Biederman \u003cebiederm@xmission.com\u003e\nCc: Paul E. McKenney \u003cpaulmck@linux.vnet.ibm.com\u003e\nCc: kernel-team@android.com\nCc: linaro-kernel@lists.linaro.org\nCc: Peter Zijlstra \u003cpeterz@infradead.org\u003e\nLink: http://lkml.kernel.org/r/20120209164519.GA10266@oksana.dev.rtsoft.ru\nSigned-off-by: Ingo Molnar \u003cmingo@elte.hu\u003e\n" }, { "commit": "8cdb878dcb359fd1137e9abdee9322f5e9bcfdf8", "tree": "146afc01f3c1d7cbc944328484d077032bc53bfd", "parents": [ "24b36da33c64368775f4ef9386d44dce1d2bc8cf" ], "author": { "name": "Christopher Yeoh", "email": "cyeoh@au1.ibm.com", "time": "Thu Feb 02 11:34:09 2012 +1030" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Thu Feb 02 12:55:17 2012 -0800" }, "message": "Fix race in process_vm_rw_core\n\nThis fixes the race in process_vm_core found by Oleg (see\n\n http://article.gmane.org/gmane.linux.kernel/1235667/\n\nfor details).\n\nThis has been updated since I last sent it as the creation of the new\nmm_access() function did almost exactly the same thing as parts of the\nprevious version of this patch did.\n\nIn order to use mm_access() even when /proc isn\u0027t enabled, we move it to\nkernel/fork.c where other related process mm access functions already\nare.\n\nSigned-off-by: Chris Yeoh \u003cyeohc@au1.ibm.com\u003e\nSigned-off-by: Linus Torvalds \u003ctorvalds@linux-foundation.org\u003e\n" }, { "commit": "4ec4412e1e91f44a3dcb97b6c9172a13fc78bac9", "tree": "a98f635907975c2f14c01c24418e102337250b8d", "parents": [ "39be350127ec60a078edffe5b4915dafba4ba514" ], "author": { "name": "Vincent Guittot", "email": "vincent.guittot@linaro.org", "time": "Mon Dec 12 20:21:08 2011 +0100" }, "committer": { "name": "Ingo Molnar", "email": "mingo@elte.hu", "time": "Fri Jan 27 13:28:49 2012 +0100" }, "message": "sched: Ensure cpu_power periodic update\n\nWith a lot of small tasks, the softirq sched is nearly never called\nwhen no_hz is enabled. In this case load_balance() is mainly called\nwith the newly_idle mode which doesn\u0027t update the cpu_power.\n\nAdd a next_update field which ensure a maximum update period when\nthere is short activity.\n\nHaving stale cpu_power information can skew the load-balancing\ndecisions, this is cured by the guaranteed update.\n\nSigned-off-by: Vincent Guittot \u003cvincent.guittot@linaro.org\u003e\nSigned-off-by: Peter Zijlstra \u003ca.p.zijlstra@chello.nl\u003e\nLink: http://lkml.kernel.org/r/1323717668-2143-1-git-send-email-vincent.guittot@linaro.org\n" }, { "commit": "39be350127ec60a078edffe5b4915dafba4ba514", "tree": "9b1ad6ee75c3b5842434b697b96ccdfbe1a40a2f", "parents": [ "cb297a3e433dbdcf7ad81e0564e7b804c941ff0d" ], "author": { "name": "Peter Zijlstra", "email": "a.p.zijlstra@chello.nl", "time": "Thu Jan 26 12:44:34 2012 +0100" }, "committer": { "name": "Ingo Molnar", "email": "mingo@elte.hu", "time": "Fri Jan 27 13:28:48 2012 +0100" }, "message": "sched, block: Unify cache detection\n\nThe block layer has some code trying to determine if two CPUs share a\ncache, the scheduler has a similar function. Expose the function used\nby the scheduler and make the block layer use it, thereby removing the\nblock layers usage of CONFIG_SCHED* and topology bits.\n\nSigned-off-by: Peter Zijlstra \u003ca.p.zijlstra@chello.nl\u003e\nAcked-by: Jens Axboe \u003caxboe@kernel.dk\u003e\nLink: http://lkml.kernel.org/r/1327579450.2446.95.camel@twins\n" }, { "commit": "2437dcbf555bff04e4ee8b8dba4587f946c1cd3d", "tree": "f04f3ed779c25caa933744d2d5965ca4e297f05d", "parents": [ "0dbfe8ddaaab9fe5bc8672c064d3ede6cd66201a", "b64b223aed5f8aeeb6c046f1b050a8f976b87de0" ], "author": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Thu Jan 26 12:45:41 2012 -0800" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Thu Jan 26 12:45:41 2012 -0800" }, "message": "Merge branch \u0027core-urgent-for-linus\u0027 of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip\n\n* \u0027core-urgent-for-linus\u0027 of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:\n rcu: Add missing __cpuinit annotation in rcutorture code\n sched: Add \"const\" to is_idle_task() parameter\n rcu: Make rcutorture bool parameters really bool (core code)\n memblock: Fix alloc failure due to dumb underflow protection in memblock_find_in_range_node()\n" }, { "commit": "fa757281a08799fd6c0f7ec6f111d1cd66afc97b", "tree": "664f8728e55e3d37ca8eb3c6c9087d2da9860463", "parents": [ "2f6c76aa5f0fb53059730c628ac59ef62a14ed7a" ], "author": { "name": "Randy Dunlap", "email": "rdunlap@xenotime.net", "time": "Sat Jan 21 11:03:13 2012 -0800" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Mon Jan 23 08:44:54 2012 -0800" }, "message": "kernel-doc: fix kernel-doc warnings in sched\n\nFix new kernel-doc notation warnings:\n\nWarning(include/linux/sched.h:2094): No description found for parameter \u0027p\u0027\nWarning(include/linux/sched.h:2094): Excess function parameter \u0027tsk\u0027 description in \u0027is_idle_task\u0027\nWarning(kernel/sched/cpupri.c:139): No description found for parameter \u0027newpri\u0027\nWarning(kernel/sched/cpupri.c:139): Excess function parameter \u0027pri\u0027 description in \u0027cpupri_set\u0027\nWarning(kernel/sched/cpupri.c:208): Excess function parameter \u0027bootmem\u0027 description in \u0027cpupri_init\u0027\n\nSigned-off-by: Randy Dunlap \u003crdunlap@xenotime.net\u003e\nCc:\tIngo Molnar \u003cmingo@elte.hu\u003e\nCc:\tPeter Zijlstra \u003cpeterz@infradead.org\u003e\nSigned-off-by: Linus Torvalds \u003ctorvalds@linux-foundation.org\u003e\n" }, { "commit": "b64b223aed5f8aeeb6c046f1b050a8f976b87de0", "tree": "f4ce305aaae5fa04f55ad04a3b9ee501158decde", "parents": [ "5d53cb27d849c899136c048ec84c940ac449494b", "4410030646be072b82ec1892ad5cc7d91af384d8" ], "author": { "name": "Ingo Molnar", "email": "mingo@elte.hu", "time": "Tue Jan 17 09:44:17 2012 +0100" }, "committer": { "name": "Ingo Molnar", "email": "mingo@elte.hu", "time": "Tue Jan 17 09:44:17 2012 +0100" }, "message": "Merge branch \u0027rcu/urgent\u0027 of git://git.kernel.org/pub/scm/linux/kernel/git/paulmck/linux-rcu into core/urgent\n" }, { "commit": "7061ca3b6c99fc78115560b9a10227c8c5fafc45", "tree": "bdc970631a678cefa0902b42575c3e28b2594527", "parents": [ "d8e8ed95cda1dfd6813588333d36552935eba4a1" ], "author": { "name": "Paul E. McKenney", "email": "paulmck@linux.vnet.ibm.com", "time": "Tue Dec 20 08:20:46 2011 -0800" }, "committer": { "name": "Paul E. McKenney", "email": "paulmck@linux.vnet.ibm.com", "time": "Mon Jan 16 09:44:00 2012 -0800" }, "message": "sched: Add \"const\" to is_idle_task() parameter\n\nThis patch fixes a build warning in -next due to a const pointer being\npassed to is_idle_task(). Because is_idle_task() does not modify anything,\nthis commit adds the \"const\" to is_idle_task()\u0027s argument declaration.\n\nReported-by: Stephen Rothwell \u003csfr@canb.auug.org.au\u003e\nSigned-off-by: Paul E. McKenney \u003cpaulmck@linux.vnet.ibm.com\u003e\n" }, { "commit": "9402c95f34a66e81eba473a2f7267bbae5a1dee2", "tree": "c46628e702d625a737fedbd9de88138a94c93d1f", "parents": [ "80bf007f20b16272f210e0803f739f5606cff59d" ], "author": { "name": "Joe Perches", "email": "joe@perches.com", "time": "Thu Jan 12 17:17:17 2012 -0800" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Thu Jan 12 20:13:03 2012 -0800" }, "message": "treewide: remove useless NORET_TYPE macro and uses\n\nIt\u0027s a very old and now unused prototype marking so just delete it.\n\nNeaten panic pointer argument style to keep checkpatch quiet.\n\nSigned-off-by: Joe Perches \u003cjoe@perches.com\u003e\nCc: Ingo Molnar \u003cmingo@elte.hu\u003e\nCc: Peter Zijlstra \u003cpeterz@infradead.org\u003e\nCc: Haavard Skinnemoen \u003chskinnemoen@gmail.com\u003e\nCc: Hans-Christian Egtvedt \u003cegtvedt@samfundet.no\u003e\nCc: Tony Luck \u003ctony.luck@intel.com\u003e\nCc: Fenghua Yu \u003cfenghua.yu@intel.com\u003e\nAcked-by: Geert Uytterhoeven \u003cgeert@linux-m68k.org\u003e\nAcked-by: Ralf Baechle \u003cralf@linux-mips.org\u003e\nCc: Benjamin Herrenschmidt \u003cbenh@kernel.crashing.org\u003e\nCc: Paul Mackerras \u003cpaulus@samba.org\u003e\nCc: Martin Schwidefsky \u003cschwidefsky@de.ibm.com\u003e\nCc: Heiko Carstens \u003cheiko.carstens@de.ibm.com\u003e\nCc: Chris Metcalf \u003ccmetcalf@tilera.com\u003e\nSigned-off-by: Andrew Morton \u003cakpm@linux-foundation.org\u003e\nSigned-off-by: Linus Torvalds \u003ctorvalds@linux-foundation.org\u003e\n" }, { "commit": "001a541ea9163ace5e8243ee0e907ad80a4c0ec2", "tree": "a76225046369c440de93739add9823f5ea060245", "parents": [ "40ba587923ae67090d9f141c1d3c951be5c1420e", "bc31b86a5923fad5f3fbb6192f767f410241ba27" ], "author": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Tue Jan 10 16:59:59 2012 -0800" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Tue Jan 10 16:59:59 2012 -0800" }, "message": "Merge branch \u0027writeback-for-linus\u0027 of git://git.kernel.org/pub/scm/linux/kernel/git/wfg/linux\n\n* \u0027writeback-for-linus\u0027 of git://git.kernel.org/pub/scm/linux/kernel/git/wfg/linux:\n writeback: move MIN_WRITEBACK_PAGES to fs-writeback.c\n writeback: balanced_rate cannot exceed write bandwidth\n writeback: do strict bdi dirty_exceeded\n writeback: avoid tiny dirty poll intervals\n writeback: max, min and target dirty pause time\n writeback: dirty ratelimit - think time compensation\n btrfs: fix dirtied pages accounting on sub-page writes\n writeback: fix dirtied pages accounting on redirty\n writeback: fix dirtied pages accounting on sub-page writes\n writeback: charge leaked page dirties to active tasks\n writeback: Include all dirty inodes in background writeback\n" }, { "commit": "db0c2bf69aa095d4a6de7b1145f29fe9a7c0f6a3", "tree": "8f38957c01b18edddd44d49ecc3beeac08a20b4e", "parents": [ "ac69e0928054ff29a5049902fb477f9c7605c773", "0d19ea866562e46989412a0676412fa0983c9ce7" ], "author": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Mon Jan 09 12:59:24 2012 -0800" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Mon Jan 09 12:59:24 2012 -0800" }, "message": "Merge branch \u0027for-3.3\u0027 of git://git.kernel.org/pub/scm/linux/kernel/git/tj/cgroup\n\n* \u0027for-3.3\u0027 of git://git.kernel.org/pub/scm/linux/kernel/git/tj/cgroup: (21 commits)\n cgroup: fix to allow mounting a hierarchy by name\n cgroup: move assignement out of condition in cgroup_attach_proc()\n cgroup: Remove task_lock() from cgroup_post_fork()\n cgroup: add sparse annotation to cgroup_iter_start() and cgroup_iter_end()\n cgroup: mark cgroup_rmdir_waitq and cgroup_attach_proc() as static\n cgroup: only need to check oldcgrp\u003d\u003dnewgrp once\n cgroup: remove redundant get/put of task struct\n cgroup: remove redundant get/put of old css_set from migrate\n cgroup: Remove unnecessary task_lock before fetching css_set on migration\n cgroup: Drop task_lock(parent) on cgroup_fork()\n cgroups: remove redundant get/put of css_set from css_set_check_fetched()\n resource cgroups: remove bogus cast\n cgroup: kill subsys-\u003ecan_attach_task(), pre_attach() and attach_task()\n cgroup, cpuset: don\u0027t use ss-\u003epre_attach()\n cgroup: don\u0027t use subsys-\u003ecan_attach_task() or -\u003eattach_task()\n cgroup: introduce cgroup_taskset and use it in subsys-\u003ecan_attach(), cancel_attach() and attach()\n cgroup: improve old cgroup handling in cgroup_attach_proc()\n cgroup: always lock threadgroup during migration\n threadgroup: extend threadgroup_lock() to cover exit and exec\n threadgroup: rename signal-\u003ethreadgroup_fork_lock to -\u003egroup_rwsem\n ...\n\nFix up conflict in kernel/cgroup.c due to commit e0197aae59e5: \"cgroups:\nfix a css_set not found bug in cgroup_attach_proc\" that already\nmentioned that the bug is fixed (differently) in Tejun\u0027s cgroup\npatchset. This one, in other words.\n" }, { "commit": "eb59c505f8a5906ad2e053d14fab50eb8574fd6f", "tree": "c6e875adc12b481b916e847e8f80b8881a0fb02c", "parents": [ "1619ed8f60959829d070d8f39cd2f8ca0e7135ce", "c233523b3d392e530033a7587d7970dc62a02361" ], "author": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Sun Jan 08 13:10:57 2012 -0800" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Sun Jan 08 13:10:57 2012 -0800" }, "message": "Merge branch \u0027pm-for-linus\u0027 of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm\n\n* \u0027pm-for-linus\u0027 of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm: (76 commits)\n PM / Hibernate: Implement compat_ioctl for /dev/snapshot\n PM / Freezer: fix return value of freezable_schedule_timeout_killable()\n PM / shmobile: Allow the A4R domain to be turned off at run time\n PM / input / touchscreen: Make st1232 use device PM QoS constraints\n PM / QoS: Introduce dev_pm_qos_add_ancestor_request()\n PM / shmobile: Remove the stay_on flag from SH7372\u0027s PM domains\n PM / shmobile: Don\u0027t include SH7372\u0027s INTCS in syscore suspend/resume\n PM / shmobile: Add support for the sh7372 A4S power domain / sleep mode\n PM: Drop generic_subsys_pm_ops\n PM / Sleep: Remove forward-only callbacks from AMBA bus type\n PM / Sleep: Remove forward-only callbacks from platform bus type\n PM: Run the driver callback directly if the subsystem one is not there\n PM / Sleep: Make pm_op() and pm_noirq_op() return callback pointers\n PM/Devfreq: Add Exynos4-bus device DVFS driver for Exynos4210/4212/4412.\n PM / Sleep: Merge internal functions in generic_ops.c\n PM / Sleep: Simplify generic system suspend callbacks\n PM / Hibernate: Remove deprecated hibernation snapshot ioctls\n PM / Sleep: Fix freezer failures due to racy usermodehelper_is_disabled()\n ARM: S3C64XX: Implement basic power domain support\n PM / shmobile: Use common always on power domain governor\n ...\n\nFix up trivial conflict in fs/xfs/xfs_buf.c due to removal of unused\nXBT_FORCE_SLEEP bit\n" }, { "commit": "0db49b72bce26341274b74fd968501489a361ae3", "tree": "cdb076827aefb38d719d4c42f8ef291c36072fa8", "parents": [ "35b740e4662ef386f0c60e1b60aaf5b44db9914c", "1ac9bc6943edf7d181b4b1cc734981350d4f6bae" ], "author": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Fri Jan 06 08:33:28 2012 -0800" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Fri Jan 06 08:44:54 2012 -0800" }, "message": "Merge branch \u0027sched-core-for-linus\u0027 of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip\n\n* \u0027sched-core-for-linus\u0027 of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: (40 commits)\n sched/tracing: Add a new tracepoint for sleeptime\n sched: Disable scheduler warnings during oopses\n sched: Fix cgroup movement of waking process\n sched: Fix cgroup movement of newly created process\n sched: Fix cgroup movement of forking process\n sched: Remove cfs bandwidth period check in tg_set_cfs_period()\n sched: Fix load-balance lock-breaking\n sched: Replace all_pinned with a generic flags field\n sched: Only queue remote wakeups when crossing cache boundaries\n sched: Add missing rcu_dereference() around -\u003ereal_parent usage\n [S390] fix cputime overflow in uptime_proc_show\n [S390] cputime: add sparse checking and cleanup\n sched: Mark parent and real_parent as __rcu\n sched, nohz: Fix missing RCU read lock\n sched, nohz: Set the NOHZ_BALANCE_KICK flag for idle load balancer\n sched, nohz: Fix the idle cpu check in nohz_idle_balance\n sched: Use jump_labels for sched_feat\n sched/accounting: Fix parameter passing in task_group_account_field\n sched/accounting: Fix user/system tick double accounting\n sched/accounting: Re-use scheduler statistics for the root cgroup\n ...\n\nFix up conflicts in\n - arch/ia64/include/asm/cputime.h, include/asm-generic/cputime.h\n\tusecs_to_cputime64() vs the sparse cleanups\n - kernel/sched/fair.c, kernel/time/tick-sched.c\n\tscheduler changes in multiple branches\n" }, { "commit": "612ef28a045efadb3a98d4492ead7806a146485d", "tree": "05621c87b37e91c27b06d450d76adffe97ce9666", "parents": [ "c3e0ef9a298e028a82ada28101ccd5cf64d209ee", "07cde2608a3b5c66515363f1b53623b1536b9785" ], "author": { "name": "Martin Schwidefsky", "email": "schwidefsky@de.ibm.com", "time": "Mon Dec 19 19:23:15 2011 +0100" }, "committer": { "name": "Martin Schwidefsky", "email": "schwidefsky@de.ibm.com", "time": "Mon Dec 19 19:23:15 2011 +0100" }, "message": "Merge branch \u0027sched/core\u0027 of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip into cputime-tip\n\nConflicts:\n\tdrivers/cpufreq/cpufreq_conservative.c\n\tdrivers/cpufreq/cpufreq_ondemand.c\n\tdrivers/macintosh/rack-meter.c\n\tfs/proc/stat.c\n\tfs/proc/uptime.c\n\tkernel/sched/core.c\n" }, { "commit": "83712358ba0a1497ce59a4f84ce4dd0f803fe6fc", "tree": "d17ab27a7bff50616e3b63ad137c004d9ccfbcb0", "parents": [ "32c7f202a4801252a0f3578807b75a961f792870" ], "author": { "name": "Wu Fengguang", "email": "fengguang.wu@intel.com", "time": "Sat Jun 11 19:25:42 2011 -0600" }, "committer": { "name": "Wu Fengguang", "email": "fengguang.wu@intel.com", "time": "Sun Dec 18 14:20:27 2011 +0800" }, "message": "writeback: dirty ratelimit - think time compensation\n\nCompensate the task\u0027s think time when computing the final pause time,\nso that -\u003edirty_ratelimit can be executed accurately.\n\n think time :\u003d time spend outside of balance_dirty_pages()\n\nIn the rare case that the task slept longer than the 200ms period time\n(result in negative pause time), the sleep time will be compensated in\nthe following periods, too, if it\u0027s less than 1 second.\n\nAccumulated errors are carefully avoided as long as the max pause area\nis not hitted.\n\nPseudo code:\n\n period \u003d pages_dirtied / task_ratelimit;\n think \u003d jiffies - dirty_paused_when;\n pause \u003d period - think;\n\n1) normal case: period \u003e think\n\n pause \u003d period - think\n dirty_paused_when \u003d jiffies + pause\n nr_dirtied \u003d 0\n\n period time\n |\u003d\u003d\u003d\u003d\u003d\u003d\u003d\u003d\u003d\u003d\u003d\u003d\u003d\u003d\u003d\u003d\u003d\u003d\u003d\u003d\u003d\u003d\u003d\u003d\u003d\u003d\u003d\u003d\u003d\u003d\u003d\u003e|\n think time pause time\n |\u003d\u003d\u003d\u003d\u003d\u003d\u003d\u003d\u003d\u003d\u003d\u003d\u003d\u003d\u003d\u003e|\u003d\u003d\u003d\u003d\u003d\u003d\u003d\u003d\u003d\u003d\u003d\u003d\u003d\u003d\u003e|\n ------|----------------|---------------|------------------------\n dirty_paused_when jiffies\n\n2) no pause case: period \u003c\u003d think\n\n don\u0027t pause; reduce future pause time by:\n dirty_paused_when +\u003d period\n nr_dirtied \u003d 0\n\n period time\n |\u003d\u003d\u003d\u003d\u003d\u003d\u003d\u003d\u003d\u003d\u003d\u003d\u003d\u003d\u003d\u003d\u003d\u003d\u003d\u003d\u003d\u003d\u003d\u003d\u003d\u003d\u003d\u003d\u003d\u003d\u003d\u003e|\n think time\n |\u003d\u003d\u003d\u003d\u003d\u003d\u003d\u003d\u003d\u003d\u003d\u003d\u003d\u003d\u003d\u003d\u003d\u003d\u003d\u003d\u003d\u003d\u003d\u003d\u003d\u003d\u003d\u003d\u003d\u003d\u003d\u003d\u003d\u003d\u003d\u003d\u003d\u003d\u003d\u003d\u003d\u003d\u003d\u003d\u003d\u003d\u003d\u003d\u003d\u003d\u003d\u003e|\n ------|--------------------------------+-------------------|----\n dirty_paused_when jiffies\n\nAcked-by: Jan Kara \u003cjack@suse.cz\u003e\nAcked-by: Peter Zijlstra \u003ca.p.zijlstra@chello.nl\u003e\nSigned-off-by: Wu Fengguang \u003cfengguang.wu@intel.com\u003e\n" }, { "commit": "648616343cdbe904c585a6c12e323d3b3c72e46f", "tree": "514bce1b52663db4ab5662b637c764cf3c2ed1eb", "parents": [ "55b02d2f4445ad625213817a1736bf2884d32547" ], "author": { "name": "Martin Schwidefsky", "email": "schwidefsky@de.ibm.com", "time": "Thu Dec 15 14:56:09 2011 +0100" }, "committer": { "name": "Martin Schwidefsky", "email": "schwidefsky@de.ibm.com", "time": "Thu Dec 15 14:56:19 2011 +0100" }, "message": "[S390] cputime: add sparse checking and cleanup\n\nMake cputime_t and cputime64_t nocast to enable sparse checking to\ndetect incorrect use of cputime. Drop the cputime macros for simple\nscalar operations. The conversion macros are still needed.\n\nSigned-off-by: Martin Schwidefsky \u003cschwidefsky@de.ibm.com\u003e\n" }, { "commit": "abd63bc3a0f65ae9d85bc3b1bb067d3e3c2b2cc2", "tree": "5c40dd25121062a186d203fb9343940de740be74", "parents": [ "6a54aebf6978e9f296a4d3da3e40af425163c22e" ], "author": { "name": "Kees Cook", "email": "keescook@chromium.org", "time": "Wed Dec 14 14:39:26 2011 -0800" }, "committer": { "name": "Ingo Molnar", "email": "mingo@elte.hu", "time": "Thu Dec 15 08:21:59 2011 +0100" }, "message": "sched: Mark parent and real_parent as __rcu\n\nThe parent and real_parent pointers should be considered __rcu,\nsince they should be held under either tasklist_lock or\nrcu_read_lock.\n\nSigned-off-by: Kees Cook \u003ckeescook@chromium.org\u003e\nCc: Peter Zijlstra \u003cpeterz@infradead.org\u003e\nCc: Paul E. McKenney \u003cpaulmck@linux.vnet.ibm.com\u003e\nCc: Al Viro \u003cviro@zeniv.linux.org.uk\u003e\nLink: http://lkml.kernel.org/r/20111214223925.GA27578@www.outflux.net\nSigned-off-by: Ingo Molnar \u003cmingo@elte.hu\u003e\n" }, { "commit": "6a54aebf6978e9f296a4d3da3e40af425163c22e", "tree": "8217c7114db02d8b69c22fc44880749426949bc3", "parents": [ "067491b7313c41f49607fce782d29344d1472587", "dc47ce90c3a822cd7c9e9339fe4d5f61dcb26b50" ], "author": { "name": "Ingo Molnar", "email": "mingo@elte.hu", "time": "Thu Dec 15 08:21:21 2011 +0100" }, "committer": { "name": "Ingo Molnar", "email": "mingo@elte.hu", "time": "Thu Dec 15 08:21:30 2011 +0100" }, "message": "Merge commit \u0027v3.2-rc5\u0027 into sched/core\n\nMerge reason: Pick up the latest fixes.\n\nSigned-off-by: Ingo Molnar \u003cmingo@elte.hu\u003e\n" }, { "commit": "77e4ef99d1c596a31747668e5fd837f77b6349b6", "tree": "b9dcc8d73f9febf6a18edc0b2efa3ecddc2a7a35", "parents": [ "257058ae2b971646b96ab3a15605ac69186e562a" ], "author": { "name": "Tejun Heo", "email": "tj@kernel.org", "time": "Mon Dec 12 18:12:21 2011 -0800" }, "committer": { "name": "Tejun Heo", "email": "tj@kernel.org", "time": "Mon Dec 12 18:12:21 2011 -0800" }, "message": "threadgroup: extend threadgroup_lock() to cover exit and exec\n\nthreadgroup_lock() protected only protected against new addition to\nthe threadgroup, which was inherently somewhat incomplete and\nproblematic for its only user cgroup. On-going migration could race\nagainst exec and exit leading to interesting problems - the symmetry\nbetween various attach methods, task exiting during method execution,\n-\u003eexit() racing against attach methods, migrating task switching basic\nproperties during exec and so on.\n\nThis patch extends threadgroup_lock() such that it protects against\nall three threadgroup altering operations - fork, exit and exec. For\nexit, threadgroup_change_begin/end() calls are added to exit_signals\naround assertion of PF_EXITING. For exec, threadgroup_[un]lock() are\nupdated to also grab and release cred_guard_mutex.\n\nWith this change, threadgroup_lock() guarantees that the target\nthreadgroup will remain stable - no new task will be added, no new\nPF_EXITING will be set and exec won\u0027t happen.\n\nThe next patch will update cgroup so that it can take full advantage\nof this change.\n\n-v2: beefed up comment as suggested by Frederic.\n\n-v3: narrowed scope of protection in exit path as suggested by\n Frederic.\n\nSigned-off-by: Tejun Heo \u003ctj@kernel.org\u003e\nReviewed-by: KAMEZAWA Hiroyuki \u003ckamezawa.hiroyu@jp.fujitsu.com\u003e\nAcked-by: Li Zefan \u003clizf@cn.fujitsu.com\u003e\nAcked-by: Frederic Weisbecker \u003cfweisbec@gmail.com\u003e\nCc: Oleg Nesterov \u003coleg@redhat.com\u003e\nCc: Andrew Morton \u003cakpm@linux-foundation.org\u003e\nCc: Paul Menage \u003cpaul@paulmenage.org\u003e\nCc: Linus Torvalds \u003ctorvalds@linux-foundation.org\u003e\n" }, { "commit": "257058ae2b971646b96ab3a15605ac69186e562a", "tree": "b8a462e64c4bb4b43dcc6c9d05b194f9c747c91d", "parents": [ "e25e2cbb4c6679bed5f52fb0f2cc381688297901" ], "author": { "name": "Tejun Heo", "email": "tj@kernel.org", "time": "Mon Dec 12 18:12:21 2011 -0800" }, "committer": { "name": "Tejun Heo", "email": "tj@kernel.org", "time": "Mon Dec 12 18:12:21 2011 -0800" }, "message": "threadgroup: rename signal-\u003ethreadgroup_fork_lock to -\u003egroup_rwsem\n\nMake the following renames to prepare for extension of threadgroup\nlocking.\n\n* s/signal-\u003ethreadgroup_fork_lock/signal-\u003egroup_rwsem/\n* s/threadgroup_fork_read_lock()/threadgroup_change_begin()/\n* s/threadgroup_fork_read_unlock()/threadgroup_change_end()/\n* s/threadgroup_fork_write_lock()/threadgroup_lock()/\n* s/threadgroup_fork_write_unlock()/threadgroup_unlock()/\n\nThis patch doesn\u0027t cause any behavior change.\n\n-v2: Rename threadgroup_change_done() to threadgroup_change_end() per\n KAMEZAWA\u0027s suggestion.\n\nSigned-off-by: Tejun Heo \u003ctj@kernel.org\u003e\nReviewed-by: KAMEZAWA Hiroyuki \u003ckamezawa.hiroyu@jp.fujitsu.com\u003e\nAcked-by: Li Zefan \u003clizf@cn.fujitsu.com\u003e\nCc: Oleg Nesterov \u003coleg@redhat.com\u003e\nCc: Andrew Morton \u003cakpm@linux-foundation.org\u003e\nCc: Paul Menage \u003cpaul@paulmenage.org\u003e\n" }, { "commit": "c4f3060843506ba6d473ab9a0afe5bd5dc93a00d", "tree": "3fa6ed6ea9288daa19426a5402d5bcb08f6edcbe", "parents": [ "bb3bf7052de520f2d21a1275e95fac7a84d89e4c" ], "author": { "name": "Paul E. McKenney", "email": "paul.mckenney@linaro.org", "time": "Thu Nov 10 12:41:56 2011 -0800" }, "committer": { "name": "Paul E. McKenney", "email": "paulmck@linux.vnet.ibm.com", "time": "Sun Dec 11 10:31:47 2011 -0800" }, "message": "sched: Add is_idle_task() to handle invalidated uses of idle_cpu()\n\nCommit 908a3283 (Fix idle_cpu()) invalidated some uses of idle_cpu(),\nwhich used to say whether or not the CPU was running the idle task,\nbut now instead says whether or not the CPU is running the idle task\nin the absence of pending wakeups. Although this new implementation\ngives a better answer to the question \"is this CPU idle?\", it also\ninvalidates other uses that were made of idle_cpu().\n\nThis commit therefore introduces a new is_idle_task() API member\nthat determines whether or not the specified task is one of the\nidle tasks, allowing open-coded \"-\u003epid \u003d\u003d 0\" sequences to be replaced\nby something more meaningful.\n\nSuggested-by: Josh Triplett \u003cjosh@joshtriplett.org\u003e\nSuggested-by: Peter Zijlstra \u003cpeterz@infradead.org\u003e\nSigned-off-by: Paul E. McKenney \u003cpaul.mckenney@linaro.org\u003e\nSigned-off-by: Paul E. McKenney \u003cpaulmck@linux.vnet.ibm.com\u003e\n" }, { "commit": "fdaabd800bdd60652a448994eeb77442180db6c0", "tree": "c66947d9a7ffac9f66395354878ba0184d010f9e", "parents": [ "44252e421ad81e711c5a9db158fad7f433f70665" ], "author": { "name": "Peter Zijlstra", "email": "a.p.zijlstra@chello.nl", "time": "Tue Dec 06 12:47:55 2011 +0100" }, "committer": { "name": "Ingo Molnar", "email": "mingo@elte.hu", "time": "Tue Dec 06 20:51:18 2011 +0100" }, "message": "sched: Fix compile error for UP,!NOHZ\n\nCommit 69e1e811 (\"sched, nohz: Track nr_busy_cpus in the\nsched_group_power\") messed up the static inline function definition.\n\nSigned-off-by: Peter Zijlstra \u003ca.p.zijlstra@chello.nl\u003e\nCc: Suresh Siddha \u003csuresh.b.siddha@intel.com\u003e\nLink: http://lkml.kernel.org/n/tip-abjah8ctq5qrjjtdiabe8lph@git.kernel.org\nSigned-off-by: Ingo Molnar \u003cmingo@elte.hu\u003e\n" }, { "commit": "69e1e811dcc436a6b129dbef273ad9ec22d095ce", "tree": "f07179af4989178733727683796927948db9059a", "parents": [ "1c792db7f7957e2e34b9a164f08200e36a25dfd0" ], "author": { "name": "Suresh Siddha", "email": "suresh.b.siddha@intel.com", "time": "Thu Dec 01 17:07:33 2011 -0800" }, "committer": { "name": "Ingo Molnar", "email": "mingo@elte.hu", "time": "Tue Dec 06 09:06:32 2011 +0100" }, "message": "sched, nohz: Track nr_busy_cpus in the sched_group_power\n\nIntroduce nr_busy_cpus in the struct sched_group_power [Not in sched_group\nbecause sched groups are duplicated for the SD_OVERLAP scheduler domain]\nand for each cpu that enters and exits idle, this parameter will\nbe updated in each scheduler group of the scheduler domain that this cpu\nbelongs to.\n\nTo avoid the frequent update of this state as the cpu enters\nand exits idle, the update of the stat during idle exit is\ndelayed to the first timer tick that happens after the cpu becomes busy.\nThis is done using NOHZ_IDLE flag in the struct rq\u0027s nohz_flags.\n\nSigned-off-by: Suresh Siddha \u003csuresh.b.siddha@intel.com\u003e\nSigned-off-by: Peter Zijlstra \u003ca.p.zijlstra@chello.nl\u003e\nCc: Thomas Gleixner \u003ctglx@linutronix.de\u003e\nLink: http://lkml.kernel.org/r/20111202010832.555984323@sbsiddha-desk.sc.intel.com\nSigned-off-by: Ingo Molnar \u003cmingo@elte.hu\u003e\n" }, { "commit": "986b11c3ee9e0eace25fe74a502205f7fe8c179b", "tree": "2271bc519eac458fd92799f5731e2ef604f69341", "parents": [ "bb58dd5d1ffad6c2d21c69698ba766dad4ae54e6", "24b7ead3fb0bae267c2ee50898eb4c13aedd1e9f" ], "author": { "name": "Rafael J. Wysocki", "email": "rjw@sisk.pl", "time": "Wed Nov 23 21:09:02 2011 +0100" }, "committer": { "name": "Rafael J. Wysocki", "email": "rjw@sisk.pl", "time": "Wed Nov 23 21:09:02 2011 +0100" }, "message": "Merge branch \u0027pm-freezer\u0027 of git://git.kernel.org/pub/scm/linux/kernel/git/tj/misc into pm-freezer\n\n* \u0027pm-freezer\u0027 of git://git.kernel.org/pub/scm/linux/kernel/git/tj/misc: (24 commits)\n freezer: fix wait_event_freezable/__thaw_task races\n freezer: kill unused set_freezable_with_signal()\n dmatest: don\u0027t use set_freezable_with_signal()\n usb_storage: don\u0027t use set_freezable_with_signal()\n freezer: remove unused @sig_only from freeze_task()\n freezer: use lock_task_sighand() in fake_signal_wake_up()\n freezer: restructure __refrigerator()\n freezer: fix set_freezable[_with_signal]() race\n freezer: remove should_send_signal() and update frozen()\n freezer: remove now unused TIF_FREEZE\n freezer: make freezing() test freeze conditions in effect instead of TIF_FREEZE\n cgroup_freezer: prepare for removal of TIF_FREEZE\n freezer: clean up freeze_processes() failure path\n freezer: kill PF_FREEZING\n freezer: test freezable conditions while holding freezer_lock\n freezer: make freezing indicate freeze condition in effect\n freezer: use dedicated lock instead of task_lock() + memory barrier\n freezer: don\u0027t distinguish nosig tasks on thaw\n freezer: remove racy clear_freeze_flag() and set PF_NOFREEZE on dead tasks\n freezer: rename thaw_process() to __thaw_task() and simplify the implementation\n ...\n" }, { "commit": "34b087e48367c252e343c2f8de65676a78af1e4a", "tree": "fbe94bad0a3073c6f4231752fba99c6bc8702277", "parents": [ "adfa543e7314b36ac55a40019977de6e47946dd7" ], "author": { "name": "Tejun Heo", "email": "tj@kernel.org", "time": "Wed Nov 23 09:28:17 2011 -0800" }, "committer": { "name": "Tejun Heo", "email": "tj@kernel.org", "time": "Wed Nov 23 09:28:17 2011 -0800" }, "message": "freezer: kill unused set_freezable_with_signal()\n\nThere\u0027s no in-kernel user of set_freezable_with_signal() left. Mixing\nTIF_SIGPENDING with kernel threads can lead to nasty corner cases as\nkernel threads never travel signal delivery path on their own.\n\ne.g. the current implementation is buggy in the cancelation path of\n__thaw_task(). It calls recalc_sigpending_and_wake() in an attempt to\nclear TIF_SIGPENDING but the function never clears it regardless of\nsigpending state. This means that signallable freezable kthreads may\ncontinue executing with !freezing() \u0026\u0026 stuck TIF_SIGPENDING, which can\nbe troublesome.\n\nThis patch removes set_freezable_with_signal() along with\nPF_FREEZER_NOSIG and recalc_sigpending*() calls in freezer. User\ntasks get TIF_SIGPENDING, kernel tasks get woken up and the spurious\nsigpending is dealt with in the usual signal delivery path.\n\nSigned-off-by: Tejun Heo \u003ctj@kernel.org\u003e\nAcked-by: Oleg Nesterov \u003coleg@redhat.com\u003e\n" }, { "commit": "376fede80e74d98b49d1ba9ac18f23c9fd026ddd", "tree": "78a48a9565efabba585dd9253c6f2c12966a995e", "parents": [ "85f1d476653f52c97ca75466b2494e67c1cbd25d" ], "author": { "name": "Tejun Heo", "email": "tj@kernel.org", "time": "Mon Nov 21 12:32:24 2011 -0800" }, "committer": { "name": "Tejun Heo", "email": "tj@kernel.org", "time": "Mon Nov 21 12:32:24 2011 -0800" }, "message": "freezer: kill PF_FREEZING\n\nWith the previous changes, there\u0027s no meaningful difference between\nPF_FREEZING and PF_FROZEN. Remove PF_FREEZING and use PF_FROZEN\ninstead in task_contributes_to_load().\n\nSigned-off-by: Tejun Heo \u003ctj@kernel.org\u003e\n" }, { "commit": "468e6a20afaccb67e2a7d7f60d301f90e1c6f301", "tree": "5558e92e85decd0fa0bb95ed6e637e1f68ea2fe1", "parents": [ "1df647197c5b8aacaeb58592cba9a1df322c9000" ], "author": { "name": "Wu Fengguang", "email": "fengguang.wu@intel.com", "time": "Wed Sep 07 10:41:32 2011 -0600" }, "committer": { "name": "Wu Fengguang", "email": "fengguang.wu@intel.com", "time": "Thu Nov 17 20:49:06 2011 +0800" }, "message": "writeback: remove vm_dirties and task-\u003edirties\n\nThey are not used any more.\n\nSigned-off-by: Wu Fengguang \u003cfengguang.wu@intel.com\u003e\n" }, { "commit": "029632fbb7b7c9d85063cc9eb470de6c54873df3", "tree": "511303f0fa32f997c4b2f68364b032555b6a642e", "parents": [ "60686317da05049385eae86e44c710cde535f95f" ], "author": { "name": "Peter Zijlstra", "email": "a.p.zijlstra@chello.nl", "time": "Tue Oct 25 10:00:11 2011 +0200" }, "committer": { "name": "Ingo Molnar", "email": "mingo@elte.hu", "time": "Thu Nov 17 12:20:19 2011 +0100" }, "message": "sched: Make separate sched*.c translation units\n\nSince once needs to do something at conferences and fixing compile\nwarnings doesn\u0027t actually require much if any attention I decided\nto break up the sched.c #include \"*.c\" fest.\n\nThis further modularizes the scheduler code.\n\nSigned-off-by: Peter Zijlstra \u003ca.p.zijlstra@chello.nl\u003e\nLink: http://lkml.kernel.org/n/tip-x0fcd3mnp8f9c99grcpewmhi@git.kernel.org\nSigned-off-by: Ingo Molnar \u003cmingo@elte.hu\u003e\n" }, { "commit": "208bca0860406d16398145ddd950036a737c3c9d", "tree": "7797a16c17d8bd155120126fa7976727fc6de013", "parents": [ "6aad3738f6a79fd0ca480eaceefe064cc471f6eb", "0e175a1835ffc979e55787774e58ec79e41957d7" ], "author": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Sun Nov 06 19:02:23 2011 -0800" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Sun Nov 06 19:02:23 2011 -0800" }, "message": "Merge branch \u0027writeback-for-linus\u0027 of git://git.kernel.org/pub/scm/linux/kernel/git/wfg/linux\n\n* \u0027writeback-for-linus\u0027 of git://git.kernel.org/pub/scm/linux/kernel/git/wfg/linux:\n writeback: Add a \u0027reason\u0027 to wb_writeback_work\n writeback: send work item to queue_io, move_expired_inodes\n writeback: trace event balance_dirty_pages\n writeback: trace event bdi_dirty_ratelimit\n writeback: fix ppc compile warnings on do_div(long long, unsigned long)\n writeback: per-bdi background threshold\n writeback: dirty position control - bdi reserve area\n writeback: control dirty pause time\n writeback: limit max dirty pause time\n writeback: IO-less balance_dirty_pages()\n writeback: per task dirty rate limit\n writeback: stabilize bdi-\u003edirty_ratelimit\n writeback: dirty rate control\n writeback: add bg_threshold parameter to __bdi_update_bandwidth()\n writeback: dirty position control\n writeback: account per-bdi accumulated dirtied pages\n" }, { "commit": "8a4a8918ed6e4a361f4df19f199bbc2d0a89a46c", "tree": "d76974986aaaa8549baf2d6a106fa6cb60d64b88", "parents": [ "8686a0e200419322654a75155e2e6f80346a1297", "540f41edc15473ca3b2876de72646546ae101374" ], "author": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Wed Oct 26 17:08:43 2011 +0200" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Wed Oct 26 17:08:43 2011 +0200" }, "message": "Merge branch \u0027sched-core-for-linus\u0027 of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip\n\n* \u0027sched-core-for-linus\u0027 of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: (46 commits)\n llist: Add back llist_add_batch() and llist_del_first() prototypes\n sched: Don\u0027t use tasklist_lock for debug prints\n sched: Warn on rt throttling\n sched: Unify the -\u003ecpus_allowed mask copy\n sched: Wrap scheduler p-\u003ecpus_allowed access\n sched: Request for idle balance during nohz idle load balance\n sched: Use resched IPI to kick off the nohz idle balance\n sched: Fix idle_cpu()\n llist: Remove cpu_relax() usage in cmpxchg loops\n sched: Convert to struct llist\n llist: Add llist_next()\n irq_work: Use llist in the struct irq_work logic\n llist: Return whether list is empty before adding in llist_add()\n llist: Move cpu_relax() to after the cmpxchg()\n llist: Remove the platform-dependent NMI checks\n llist: Make some llist functions inline\n sched, tracing: Show PREEMPT_ACTIVE state in trace_sched_switch\n sched: Remove redundant test in check_preempt_tick()\n sched: Add documentation for bandwidth control\n sched: Return unused runtime on group dequeue\n ...\n" }, { "commit": "19b4a8d520a6e0176dd52aaa429261ad4fcaa545", "tree": "6dcf5a780718fc50b9cd79cc803daa7c7e080a02", "parents": [ "3cfef9524677a4ecb392d6fbffe6ebce6302f1d4", "048b718029033af117870d3da47da12995be14a3" ], "author": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Wed Oct 26 16:26:53 2011 +0200" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Wed Oct 26 16:26:53 2011 +0200" }, "message": "Merge branch \u0027core-rcu-for-linus\u0027 of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip\n\n* \u0027core-rcu-for-linus\u0027 of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: (45 commits)\n rcu: Move propagation of -\u003ecompleted from rcu_start_gp() to rcu_report_qs_rsp()\n rcu: Remove rcu_needs_cpu_flush() to avoid false quiescent states\n rcu: Wire up RCU_BOOST_PRIO for rcutree\n rcu: Make rcu_torture_boost() exit loops at end of test\n rcu: Make rcu_torture_fqs() exit loops at end of test\n rcu: Permit rt_mutex_unlock() with irqs disabled\n rcu: Avoid having just-onlined CPU resched itself when RCU is idle\n rcu: Suppress NMI backtraces when stall ends before dump\n rcu: Prohibit grace periods during early boot\n rcu: Simplify unboosting checks\n rcu: Prevent early boot set_need_resched() from __rcu_pending()\n rcu: Dump local stack if cannot dump all CPUs\u0027 stacks\n rcu: Move __rcu_read_unlock()\u0027s barrier() within if-statement\n rcu: Improve rcu_assign_pointer() and RCU_INIT_POINTER() documentation\n rcu: Make rcu_assign_pointer() unconditionally insert a memory barrier\n rcu: Make rcu_implicit_dynticks_qs() locals be correct size\n rcu: Eliminate in_irq() checks in rcu_enter_nohz()\n nohz: Remove nohz_cpu_mask\n rcu: Document interpretation of RCU-lockdep splats\n rcu: Allow rcutorture\u0027s stat_interval parameter to be changed at runtime\n ...\n" }, { "commit": "3cfef9524677a4ecb392d6fbffe6ebce6302f1d4", "tree": "88647d9dc50d634dee9cfeb7f354d620977a2f33", "parents": [ "982653009b883ef1529089e3e6f1ae2fee41cbe2", "68cc3990a545dc0da221b4844dd8b9c06623a6c5" ], "author": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Wed Oct 26 16:17:32 2011 +0200" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Wed Oct 26 16:17:32 2011 +0200" }, "message": "Merge branch \u0027core-locking-for-linus\u0027 of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip\n\n* \u0027core-locking-for-linus\u0027 of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: (27 commits)\n rtmutex: Add missing rcu_read_unlock() in debug_rt_mutex_print_deadlock()\n lockdep: Comment all warnings\n lib: atomic64: Change the type of local lock to raw_spinlock_t\n locking, lib/atomic64: Annotate atomic64_lock::lock as raw\n locking, x86, iommu: Annotate qi-\u003eq_lock as raw\n locking, x86, iommu: Annotate irq_2_ir_lock as raw\n locking, x86, iommu: Annotate iommu-\u003eregister_lock as raw\n locking, dma, ipu: Annotate bank_lock as raw\n locking, ARM: Annotate low level hw locks as raw\n locking, drivers/dca: Annotate dca_lock as raw\n locking, powerpc: Annotate uic-\u003elock as raw\n locking, x86: mce: Annotate cmci_discover_lock as raw\n locking, ACPI: Annotate c3_lock as raw\n locking, oprofile: Annotate oprofilefs lock as raw\n locking, video: Annotate vga console lock as raw\n locking, latencytop: Annotate latency_lock as raw\n locking, timer_stats: Annotate table_lock as raw\n locking, rwsem: Annotate inner lock as raw\n locking, semaphores: Annotate inner lock as raw\n locking, sched: Annotate thread_group_cputimer as raw\n ...\n\nFix up conflicts in kernel/posix-cpu-timers.c manually: making\ncputimer-\u003ecputime a raw lock conflicted with the ABBA fix in commit\nbcd5cff7216f (\"cputimer: Cure lock inversion\").\n" }, { "commit": "1be025d3cb40cd295123af2c394f7229ef9b30ca", "tree": "5dc14e1ea412cc7fdc3e563ad23187059fe8bfb5", "parents": [ "2d03423b2319cc854adeb28a03f65de5b5e0ab63", "a2c76b83fdd763c826f38a55127ccf25708099ce" ], "author": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Tue Oct 25 12:23:15 2011 +0200" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Tue Oct 25 12:23:15 2011 +0200" }, "message": "Merge branch \u0027usb-next\u0027 of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb\n\n* \u0027usb-next\u0027 of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb: (260 commits)\n usb: renesas_usbhs: fixup inconsistent return from usbhs_pkt_push()\n usb/isp1760: Allow to optionally trigger low-level chip reset via GPIOLIB.\n USB: gadget: midi: memory leak in f_midi_bind_config()\n USB: gadget: midi: fix range check in f_midi_out_open()\n QE/FHCI: fixed the CONTROL bug\n usb: renesas_usbhs: tidyup for smatch warnings\n USB: Fix USB Kconfig dependency problem on 85xx/QoirQ platforms\n EHCI: workaround for MosChip controller bug\n usb: gadget: file_storage: fix race on unloading\n USB: ftdi_sio.c: Use ftdi async_icount structure for TIOCMIWAIT, as in other drivers\n USB: ftdi_sio.c:Fill MSR fields of the ftdi async_icount structure\n USB: ftdi_sio.c: Fill LSR fields of the ftdi async_icount structure\n USB: ftdi_sio.c:Fill TX field of the ftdi async_icount structure\n USB: ftdi_sio.c: Fill the RX field of the ftdi async_icount structure\n USB: ftdi_sio.c: Basic icount infrastructure for ftdi_sio\n usb/isp1760: Let OF bindings depend on general CONFIG_OF instead of PPC_OF .\n USB: ftdi_sio: Support TI/Luminary Micro Stellaris BD-ICDI Board\n USB: Fix runtime wakeup on OHCI\n xHCI/USB: Make xHCI driver have a BOS descriptor.\n usb: gadget: add new usb gadget for ACM and mass storage\n ...\n" }, { "commit": "fa14ff4accfb24e59d2473f3d864d6648d80563b", "tree": "a2f3f5a16e1e740c6f96857e60c37826689d7b0b", "parents": [ "924f8f5af31423529cc3940cb2ae9fee736b7517" ], "author": { "name": "Peter Zijlstra", "email": "a.p.zijlstra@chello.nl", "time": "Mon Sep 12 13:06:17 2011 +0200" }, "committer": { "name": "Ingo Molnar", "email": "mingo@elte.hu", "time": "Tue Oct 04 12:43:58 2011 +0200" }, "message": "sched: Convert to struct llist\n\nUse the generic llist primitives.\n\nWe had a private lockless list implementation in the scheduler in the wake-list\ncode, now that we have a generic llist implementation that provides all required\noperations, switch to it.\n\nThis patch is not expected to change any behavior.\n\nSigned-off-by: Peter Zijlstra \u003ca.p.zijlstra@chello.nl\u003e\nCc: Huang Ying \u003cying.huang@intel.com\u003e\nCc: Andrew Morton \u003cakpm@linux-foundation.org\u003e\nLink: http://lkml.kernel.org/r/1315836353.26517.42.camel@twins\nSigned-off-by: Ingo Molnar \u003cmingo@elte.hu\u003e\n" }, { "commit": "22f92bacbeea24b20e447444c28e7cad9f1ac3f8", "tree": "5c3f2346804a186aa2d954f078fd2f4d44bcc26e", "parents": [ "557ab425429a5123d37f412ce3e6d6137cb621f8", "0f86267b79bc6e357b8606077c7f70239045ea9c" ], "author": { "name": "Ingo Molnar", "email": "mingo@elte.hu", "time": "Tue Oct 04 11:08:16 2011 +0200" }, "committer": { "name": "Ingo Molnar", "email": "mingo@elte.hu", "time": "Tue Oct 04 11:09:08 2011 +0200" }, "message": "Merge branch \u0027linus\u0027 into sched/core\n\nMerge reason: pick up the latest fixes.\n\nSigned-off-by: Ingo Molnar \u003cmingo@elte.hu\u003e\n" }, { "commit": "9d823e8f6b1b7b39f952d7d1795f29162143a433", "tree": "2ef4c0d29353452dd2f894e7dbd240a31bdd0a02", "parents": [ "7381131cbcf7e15d201a0ffd782a4698efe4e740" ], "author": { "name": "Wu Fengguang", "email": "fengguang.wu@intel.com", "time": "Sat Jun 11 18:10:12 2011 -0600" }, "committer": { "name": "Wu Fengguang", "email": "fengguang.wu@intel.com", "time": "Mon Oct 03 21:08:57 2011 +0800" }, "message": "writeback: per task dirty rate limit\n\nAdd two fields to task_struct.\n\n1) account dirtied pages in the individual tasks, for accuracy\n2) per-task balance_dirty_pages() call intervals, for flexibility\n\nThe balance_dirty_pages() call interval (ie. nr_dirtied_pause) will\nscale near-sqrt to the safety gap between dirty pages and threshold.\n\nThe main problem of per-task nr_dirtied is, if 1k+ tasks start dirtying\npages at exactly the same time, each task will be assigned a large\ninitial nr_dirtied_pause, so that the dirty threshold will be exceeded\nlong before each task reached its nr_dirtied_pause and hence call\nbalance_dirty_pages().\n\nThe solution is to watch for the number of pages dirtied on each CPU in\nbetween the calls into balance_dirty_pages(). If it exceeds ratelimit_pages\n(3% dirty threshold), force call balance_dirty_pages() for a chance to\nset bdi-\u003edirty_exceeded. In normal situations, this safeguarding\ncondition is not expected to trigger at all.\n\nOn the sqrt in dirty_poll_interval():\n\nIt will serve as an initial guess when dirty pages are still in the\nfreerun area.\n\nWhen dirty pages are floating inside the dirty control scope [freerun,\nlimit], a followup patch will use some refined dirty poll interval to\nget the desired pause time.\n\n thresh-dirty (MB) sqrt\n\t\t 1 16\n\t\t 2 22\n\t\t 4 32\n\t\t 8 45\n\t\t 16 64\n\t\t 32 90\n\t\t 64 128\n\t\t 128 181\n\t\t 256 256\n\t\t 512 362\n\t\t1024 512\n\nThe above table means, given 1MB (or 1GB) gap and the dd tasks polling\nbalance_dirty_pages() on every 16 (or 512) pages, the dirty limit won\u0027t\nbe exceeded as long as there are less than 16 (or 512) concurrent dd\u0027s.\n\nSo sqrt naturally leads to less overheads and more safe concurrent tasks\nfor large memory servers, which have large (thresh-freerun) gaps.\n\npeter: keep the per-CPU ratelimit for safeguarding the 1k+ tasks case\n\nCC: Peter Zijlstra \u003ca.p.zijlstra@chello.nl\u003e\nReviewed-by: Andrea Righi \u003candrea@betterlinux.com\u003e\nSigned-off-by: Wu Fengguang \u003cfengguang.wu@intel.com\u003e\n" }, { "commit": "d670ec13178d0fd8680e6742a2bc6e04f28f87d8", "tree": "81a2ac824dd92a0536e42f9a0ba3d83240856722", "parents": [ "6ebbe7a07b3bc40b168d2afc569a6543c020d2e3" ], "author": { "name": "Peter Zijlstra", "email": "a.p.zijlstra@chello.nl", "time": "Thu Sep 01 12:42:04 2011 +0200" }, "committer": { "name": "Thomas Gleixner", "email": "tglx@linutronix.de", "time": "Fri Sep 30 14:07:06 2011 +0200" }, "message": "posix-cpu-timers: Cure SMP wobbles\n\nDavid reported:\n\n Attached below is a watered-down version of rt/tst-cpuclock2.c from\n GLIBC. Just build it with \"gcc -o test test.c -lpthread -lrt\" or\n similar.\n\n Run it several times, and you will see cases where the main thread\n will measure a process clock difference before and after the nanosleep\n which is smaller than the cpu-burner thread\u0027s individual thread clock\n difference. This doesn\u0027t make any sense since the cpu-burner thread\n is part of the top-level process\u0027s thread group.\n\n I\u0027ve reproduced this on both x86-64 and sparc64 (using both 32-bit and\n 64-bit binaries).\n\n For example:\n\n [davem@boricha build-x86_64-linux]$ ./test\n process: before(0.001221967) after(0.498624371) diff(497402404)\n thread: before(0.000081692) after(0.498316431) diff(498234739)\n self: before(0.001223521) after(0.001240219) diff(16698)\n [davem@boricha build-x86_64-linux]$ \n\n The diff of \u0027process\u0027 should always be \u003e\u003d the diff of \u0027thread\u0027.\n\n I make sure to wrap the \u0027thread\u0027 clock measurements the most tightly\n around the nanosleep() call, and that the \u0027process\u0027 clock measurements\n are the outer-most ones.\n\n ---\n #include \u003cunistd.h\u003e\n #include \u003cstdio.h\u003e\n #include \u003cstdlib.h\u003e\n #include \u003ctime.h\u003e\n #include \u003cfcntl.h\u003e\n #include \u003cstring.h\u003e\n #include \u003cerrno.h\u003e\n #include \u003cpthread.h\u003e\n\n static pthread_barrier_t barrier;\n\n static void *chew_cpu(void *arg)\n {\n\t pthread_barrier_wait(\u0026barrier);\n\t while (1)\n\t\t __asm__ __volatile__(\"\" : : : \"memory\");\n\t return NULL;\n }\n\n int main(void)\n {\n\t clockid_t process_clock, my_thread_clock, th_clock;\n\t struct timespec process_before, process_after;\n\t struct timespec me_before, me_after;\n\t struct timespec th_before, th_after;\n\t struct timespec sleeptime;\n\t unsigned long diff;\n\t pthread_t th;\n\t int err;\n\n\t err \u003d clock_getcpuclockid(0, \u0026process_clock);\n\t if (err)\n\t\t return 1;\n\n\t err \u003d pthread_getcpuclockid(pthread_self(), \u0026my_thread_clock);\n\t if (err)\n\t\t return 1;\n\n\t pthread_barrier_init(\u0026barrier, NULL, 2);\n\t err \u003d pthread_create(\u0026th, NULL, chew_cpu, NULL);\n\t if (err)\n\t\t return 1;\n\n\t err \u003d pthread_getcpuclockid(th, \u0026th_clock);\n\t if (err)\n\t\t return 1;\n\n\t pthread_barrier_wait(\u0026barrier);\n\n\t err \u003d clock_gettime(process_clock, \u0026process_before);\n\t if (err)\n\t\t return 1;\n\n\t err \u003d clock_gettime(my_thread_clock, \u0026me_before);\n\t if (err)\n\t\t return 1;\n\n\t err \u003d clock_gettime(th_clock, \u0026th_before);\n\t if (err)\n\t\t return 1;\n\n\t sleeptime.tv_sec \u003d 0;\n\t sleeptime.tv_nsec \u003d 500000000;\n\t nanosleep(\u0026sleeptime, NULL);\n\n\t err \u003d clock_gettime(th_clock, \u0026th_after);\n\t if (err)\n\t\t return 1;\n\n\t err \u003d clock_gettime(my_thread_clock, \u0026me_after);\n\t if (err)\n\t\t return 1;\n\n\t err \u003d clock_gettime(process_clock, \u0026process_after);\n\t if (err)\n\t\t return 1;\n\n\t diff \u003d process_after.tv_nsec - process_before.tv_nsec;\n\t printf(\"process: before(%lu.%.9lu) after(%lu.%.9lu) diff(%lu)\\n\",\n\t\t process_before.tv_sec, process_before.tv_nsec,\n\t\t process_after.tv_sec, process_after.tv_nsec, diff);\n\t diff \u003d th_after.tv_nsec - th_before.tv_nsec;\n\t printf(\"thread: before(%lu.%.9lu) after(%lu.%.9lu) diff(%lu)\\n\",\n\t\t th_before.tv_sec, th_before.tv_nsec,\n\t\t th_after.tv_sec, th_after.tv_nsec, diff);\n\t diff \u003d me_after.tv_nsec - me_before.tv_nsec;\n\t printf(\"self: before(%lu.%.9lu) after(%lu.%.9lu) diff(%lu)\\n\",\n\t\t me_before.tv_sec, me_before.tv_nsec,\n\t\t me_after.tv_sec, me_after.tv_nsec, diff);\n\n\t return 0;\n }\n\nThis is due to us using p-\u003ese.sum_exec_runtime in\nthread_group_cputime() where we iterate the thread group and sum all\ndata. This does not take time since the last schedule operation (tick\nor otherwise) into account. We can cure this by using\ntask_sched_runtime() at the cost of having to take locks.\n\nThis also means we can (and must) do away with\nthread_group_sched_runtime() since the modified thread_group_cputime()\nis now more accurate and would deadlock when called from\nthread_group_sched_runtime().\n\nAside of that it makes the function safe on 32 bit systems. The old\ncode added t-\u003ese.sum_exec_runtime unprotected. sum_exec_runtime is a\n64bit value and could be changed on another cpu at the same time.\n\nReported-by: David Miller \u003cdavem@davemloft.net\u003e\nSigned-off-by: Peter Zijlstra \u003ca.p.zijlstra@chello.nl\u003e\nCc: stable@kernel.org\nLink: http://lkml.kernel.org/r/1314874459.7945.22.camel@twins\nTested-by: David Miller \u003cdavem@davemloft.net\u003e\nSigned-off-by: Thomas Gleixner \u003ctglx@linutronix.de\u003e\n" }, { "commit": "d178bc3a708f39cbfefc3fab37032d3f2511b4ec", "tree": "af492e92e140f1f6abad5a377a269ef7335824de", "parents": [ "edb2b255a0bebac5aeb17c7613aeb76ba4e6c63c" ], "author": { "name": "Serge Hallyn", "email": "serge.hallyn@canonical.com", "time": "Mon Sep 26 10:45:18 2011 -0500" }, "committer": { "name": "Greg Kroah-Hartman", "email": "gregkh@suse.de", "time": "Thu Sep 29 13:13:08 2011 -0700" }, "message": "user namespace: usb: make usb urbs user namespace aware (v2)\n\nAdd to the dev_state and alloc_async structures the user namespace\ncorresponding to the uid and euid. Pass these to kill_pid_info_as_uid(),\nwhich can then implement a proper, user-namespace-aware uid check.\n\nChangelog:\nSep 20: Per Oleg\u0027s suggestion: Instead of caching and passing user namespace,\n\tuid, and euid each separately, pass a struct cred.\nSep 26: Address Alan Stern\u0027s comments: don\u0027t define a struct cred at\n\tusbdev_open(), and take and put a cred at async_completed() to\n\tensure it lasts for the duration of kill_pid_info_as_cred().\n\nSigned-off-by: Serge Hallyn \u003cserge.hallyn@canonical.com\u003e\nCc: Oleg Nesterov \u003coleg@redhat.com\u003e\nCc: \"Eric W. Biederman\" \u003cebiederm@xmission.com\u003e\nCc: Tejun Heo \u003ctj@kernel.org\u003e\nSigned-off-by: Greg Kroah-Hartman \u003cgregkh@suse.de\u003e\n" }, { "commit": "82e78d80fc392ac7e98326bc8beeb8a679913ffd", "tree": "4999d3c03ed711056474c3a31512e7d3cf253b87", "parents": [ "5c51dd7349d4bb26f845f17f85daa168f5fa03f2" ], "author": { "name": "Paul E. McKenney", "email": "paul.mckenney@linaro.org", "time": "Thu Aug 04 07:55:34 2011 -0700" }, "committer": { "name": "Paul E. McKenney", "email": "paulmck@linux.vnet.ibm.com", "time": "Wed Sep 28 21:38:39 2011 -0700" }, "message": "rcu: Simplify unboosting checks\n\nCommit 7765be (Fix RCU_BOOST race handling current-\u003ercu_read_unlock_special)\nintroduced a new -\u003ercu_boosted field in the task structure. This is\nredundant because the existing -\u003ercu_boost_mutex will be non-NULL at\nany time that -\u003ercu_boosted is nonzero. Therefore, this commit removes\n-\u003ercu_boosted and tests -\u003ercu_boost_mutex instead.\n\nSigned-off-by: Paul E. McKenney \u003cpaul.mckenney@linaro.org\u003e\nSigned-off-by: Paul E. McKenney \u003cpaulmck@linux.vnet.ibm.com\u003e\n" }, { "commit": "fc0763f53e3ff6a6bfa66934662a3446b9ca6f16", "tree": "2671d3f6275c9707a620032658ecb05025e4e9fa", "parents": [ "d7bd2d68aa2ee2738a10c8ad9346b805e4ab2e1c" ], "author": { "name": "Shi, Alex", "email": "alex.shi@intel.com", "time": "Thu Jul 28 14:56:12 2011 +0800" }, "committer": { "name": "Paul E. McKenney", "email": "paulmck@linux.vnet.ibm.com", "time": "Wed Sep 28 21:38:29 2011 -0700" }, "message": "nohz: Remove nohz_cpu_mask\n\nRCU no longer uses this global variable, nor does anyone else. This\ncommit therefore removes this variable. This reduces memory footprint\nand also removes some atomic instructions and memory barriers from\nthe dyntick-idle path.\n\nSigned-off-by: Alex Shi \u003calex.shi@intel.com\u003e\nSigned-off-by: Paul E. McKenney \u003cpaulmck@linux.vnet.ibm.com\u003e\n" }, { "commit": "ee30a7b2fc072f139dac44826860d2c1f422137c", "tree": "4f11173879b25cc31822cb0a8d9dbd48395e74bc", "parents": [ "07354eb1a74d1e1ece29f8bafe0b46e8c77a95ef" ], "author": { "name": "Thomas Gleixner", "email": "tglx@linutronix.de", "time": "Sat Jul 25 18:56:56 2009 +0200" }, "committer": { "name": "Ingo Molnar", "email": "mingo@elte.hu", "time": "Tue Sep 13 11:11:55 2011 +0200" }, "message": "locking, sched: Annotate thread_group_cputimer as raw\n\nThe thread_group_cputimer lock can be taken in atomic context and therefore\ncannot be preempted on -rt - annotate it.\n\nIn mainline this change documents the low level nature of\nthe lock - otherwise there\u0027s no functional difference. Lockdep\nand Sparse checking will work as usual.\n\nSigned-off-by: Thomas Gleixner \u003ctglx@linutronix.de\u003e\nSigned-off-by: Ingo Molnar \u003cmingo@elte.hu\u003e\n" }, { "commit": "ec12cb7f31e28854efae7dd6f9544e0a66379040", "tree": "30a7293a4f9d566043f524bb4c43d4ae8b0560db", "parents": [ "a790de99599a29ad3f18667530cf4b9f4b7e3234" ], "author": { "name": "Paul Turner", "email": "pjt@google.com", "time": "Thu Jul 21 09:43:30 2011 -0700" }, "committer": { "name": "Ingo Molnar", "email": "mingo@elte.hu", "time": "Sun Aug 14 12:03:26 2011 +0200" }, "message": "sched: Accumulate per-cfs_rq cpu usage and charge against bandwidth\n\nAccount bandwidth usage on the cfs_rq level versus the task_groups to which\nthey belong. Whether we are tracking bandwidth on a given cfs_rq is maintained\nunder cfs_rq-\u003eruntime_enabled.\n\ncfs_rq\u0027s which belong to a bandwidth constrained task_group have their runtime\naccounted via the update_curr() path, which withdraws bandwidth from the global\npool as desired. Updates involving the global pool are currently protected\nunder cfs_bandwidth-\u003elock, local runtime is protected by rq-\u003elock.\n\nThis patch only assigns and tracks quota, no action is taken in the case that\ncfs_rq-\u003eruntime_used exceeds cfs_rq-\u003eruntime_assigned.\n\nSigned-off-by: Paul Turner \u003cpjt@google.com\u003e\nSigned-off-by: Nikhil Rao \u003cncrao@google.com\u003e\nSigned-off-by: Bharata B Rao \u003cbharata@linux.vnet.ibm.com\u003e\nReviewed-by: Hidetoshi Seto \u003cseto.hidetoshi@jp.fujitsu.com\u003e\nSigned-off-by: Peter Zijlstra \u003ca.p.zijlstra@chello.nl\u003e\nLink: http://lkml.kernel.org/r/20110721184757.179386821@google.com\nSigned-off-by: Ingo Molnar \u003cmingo@elte.hu\u003e\n" }, { "commit": "72fa59970f8698023045ab0713d66f3f4f96945c", "tree": "ed9a5eaf8212270d464c6d4396ae5a568352a997", "parents": [ "1d229d54dbc26971142f61c3d271a68db236d178" ], "author": { "name": "Vasiliy Kulikov", "email": "segoon@openwall.com", "time": "Mon Aug 08 19:02:04 2011 +0400" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Thu Aug 11 11:24:42 2011 -0700" }, "message": "move RLIMIT_NPROC check from set_user() to do_execve_common()\n\nThe patch http://lkml.org/lkml/2003/7/13/226 introduced an RLIMIT_NPROC\ncheck in set_user() to check for NPROC exceeding via setuid() and\nsimilar functions.\n\nBefore the check there was a possibility to greatly exceed the allowed\nnumber of processes by an unprivileged user if the program relied on\nrlimit only. But the check created new security threat: many poorly\nwritten programs simply don\u0027t check setuid() return code and believe it\ncannot fail if executed with root privileges. So, the check is removed\nin this patch because of too often privilege escalations related to\nbuggy programs.\n\nThe NPROC can still be enforced in the common code flow of daemons\nspawning user processes. Most of daemons do fork()+setuid()+execve().\nThe check introduced in execve() (1) enforces the same limit as in\nsetuid() and (2) doesn\u0027t create similar security issues.\n\nNeil Brown suggested to track what specific process has exceeded the\nlimit by setting PF_NPROC_EXCEEDED process flag. With the change only\nthis process would fail on execve(), and other processes\u0027 execve()\nbehaviour is not changed.\n\nSolar Designer suggested to re-check whether NPROC limit is still\nexceeded at the moment of execve(). If the process was sleeping for\ndays between set*uid() and execve(), and the NPROC counter step down\nunder the limit, the defered execve() failure because NPROC limit was\nexceeded days ago would be unexpected. If the limit is not exceeded\nanymore, we clear the flag on successful calls to execve() and fork().\n\nThe flag is also cleared on successful calls to set_user() as the limit\nwas exceeded for the previous user, not the current one.\n\nSimilar check was introduced in -ow patches (without the process flag).\n\nv3 - clear PF_NPROC_EXCEEDED on successful calls to set_user().\n\nReviewed-by: James Morris \u003cjmorris@namei.org\u003e\nSigned-off-by: Vasiliy Kulikov \u003csegoon@openwall.com\u003e\nAcked-by: NeilBrown \u003cneilb@suse.de\u003e\nSigned-off-by: Linus Torvalds \u003ctorvalds@linux-foundation.org\u003e\n" }, { "commit": "096a705bbc080a4041636d07514560da8d78acbe", "tree": "38c3c01225709ffa53419083ea6332f8a72610de", "parents": [ "fea80311a939a746533a6d7e7c3183729d6a3faf", "5757a6d76cdf6dda2a492c09b985c015e86779b1" ], "author": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Mon Jul 25 10:33:36 2011 -0700" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Mon Jul 25 10:33:36 2011 -0700" }, "message": "Merge branch \u0027for-3.1/core\u0027 of git://git.kernel.dk/linux-block\n\n* \u0027for-3.1/core\u0027 of git://git.kernel.dk/linux-block: (24 commits)\n block: strict rq_affinity\n backing-dev: use synchronize_rcu_expedited instead of synchronize_rcu\n block: fix patch import error in max_discard_sectors check\n block: reorder request_queue to remove 64 bit alignment padding\n CFQ: add think time check for group\n CFQ: add think time check for service tree\n CFQ: move think time check variables to a separate struct\n fixlet: Remove fs_excl from struct task.\n cfq: Remove special treatment for metadata rqs.\n block: document blk_plug list access\n block: avoid building too big plug list\n compat_ioctl: fix make headers_check regression\n block: eliminate potential for infinite loop in blkdev_issue_discard\n compat_ioctl: fix warning caused by qemu\n block: flush MEDIA_CHANGE from drivers on close(2)\n blk-throttle: Make total_nr_queued unsigned\n block: Add __attribute__((format(printf...) and fix fallout\n fs/partitions/check.c: make local symbols static\n block:remove some spare spaces in genhd.c\n block:fix the comment error in blkdev.h\n ...\n" }, { "commit": "bdc7ccfc0631797636837b10df7f87bc1e2e4ae3", "tree": "70f09f8ffee07486d41ca254b8abb05692713d1e", "parents": [ "4d4abdcb1dee03a4f9d6d2021622ed07e14dfd17", "0f3171438fc917b9f6b8b60dbb7a3fff9a0f68fd" ], "author": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Fri Jul 22 16:45:02 2011 -0700" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Fri Jul 22 16:45:02 2011 -0700" }, "message": "Merge branch \u0027sched-core-for-linus\u0027 of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip\n\n* \u0027sched-core-for-linus\u0027 of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip: (24 commits)\n sched: Cleanup duplicate local variable in [enqueue|dequeue]_task_fair\n sched: Replace use of entity_key()\n sched: Separate group-scheduling code more clearly\n sched: Reorder root_domain to remove 64 bit alignment padding\n sched: Do not attempt to destroy uninitialized rt_bandwidth\n sched: Remove unused function cpu_cfs_rq()\n sched: Fix (harmless) typo \u0027CONFG_FAIR_GROUP_SCHED\u0027\n sched, cgroup: Optimize load_balance_fair()\n sched: Don\u0027t update shares twice on on_rq parent\n sched: update correct entity\u0027s runtime in check_preempt_wakeup()\n xtensa: Use generic config PREEMPT definition\n h8300: Use generic config PREEMPT definition\n m32r: Use generic PREEMPT config\n sched: Skip autogroup when looking for all rt sched groups\n sched: Simplify mutex_spin_on_owner()\n sched: Remove rcu_read_lock() from wake_affine()\n sched: Generalize sleep inside spinlock detection\n sched: Make sleeping inside spinlock detection working in !CONFIG_PREEMPT\n sched: Isolate preempt counting in its own config option\n sched: Remove pointless in_atomic() definition check\n ...\n" }, { "commit": "8209f53d79444747782a28520187abaf689761f2", "tree": "726270ea29e037f026d77a99787b9d844531ac42", "parents": [ "22a3b9771117d566def0150ea787fcc95f16e724", "eac1b5e57d7abc836e78fd3fbcf77dbeed01edc9" ], "author": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Fri Jul 22 15:06:50 2011 -0700" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Fri Jul 22 15:06:50 2011 -0700" }, "message": "Merge branch \u0027ptrace\u0027 of git://git.kernel.org/pub/scm/linux/kernel/git/oleg/misc\n\n* \u0027ptrace\u0027 of git://git.kernel.org/pub/scm/linux/kernel/git/oleg/misc: (39 commits)\n ptrace: do_wait(traced_leader_killed_by_mt_exec) can block forever\n ptrace: fix ptrace_signal() \u0026\u0026 STOP_DEQUEUED interaction\n connector: add an event for monitoring process tracers\n ptrace: dont send SIGSTOP on auto-attach if PT_SEIZED\n ptrace: mv send-SIGSTOP from do_fork() to ptrace_init_task()\n ptrace_init_task: initialize child-\u003ejobctl explicitly\n has_stopped_jobs: s/task_is_stopped/SIGNAL_STOP_STOPPED/\n ptrace: make former thread ID available via PTRACE_GETEVENTMSG after PTRACE_EVENT_EXEC stop\n ptrace: wait_consider_task: s/same_thread_group/ptrace_reparented/\n ptrace: kill real_parent_is_ptracer() in in favor of ptrace_reparented()\n ptrace: ptrace_reparented() should check same_thread_group()\n redefine thread_group_leader() as exit_signal \u003e\u003d 0\n do not change dead_task-\u003eexit_signal\n kill task_detached()\n reparent_leader: check EXIT_DEAD instead of task_detached()\n make do_notify_parent() __must_check, update the callers\n __ptrace_detach: avoid task_detached(), check do_notify_parent()\n kill tracehook_notify_death()\n make do_notify_parent() return bool\n ptrace: s/tracehook_tracer_task()/ptrace_parent()/\n ...\n" }, { "commit": "994bf1c92270e3d7731ea08f1d1bd7a668314e60", "tree": "4409a21eab486e53fbe350a66e8a4f28b7a720c0", "parents": [ "bd96efe17d945f0bad56d592f8686dc6309905e7", "cf6ace16a3cd8b728fb0afa68368fd40bbeae19f" ], "author": { "name": "Ingo Molnar", "email": "mingo@elte.hu", "time": "Thu Jul 21 17:59:54 2011 +0200" }, "committer": { "name": "Ingo Molnar", "email": "mingo@elte.hu", "time": "Thu Jul 21 18:00:01 2011 +0200" }, "message": "Merge branch \u0027linus\u0027 into sched/core\n\nMerge reason: pick up the latest scheduler fixes.\n\nSigned-off-by: Ingo Molnar \u003cmingo@elte.hu\u003e\n" }, { "commit": "cf6ace16a3cd8b728fb0afa68368fd40bbeae19f", "tree": "489c64380668e8c5a29d3f36f37554e4b081a647", "parents": [ "acc11eab70591744369722280c9ce162a6193494", "d1e9ae47a0285d3f1699e8219ce50f656243b93f" ], "author": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Wed Jul 20 15:56:25 2011 -0700" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Wed Jul 20 15:56:25 2011 -0700" }, "message": "Merge branch \u0027core-urgent-for-linus\u0027 of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip\n\n* \u0027core-urgent-for-linus\u0027 of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip:\n signal: align __lock_task_sighand() irq disabling and RCU\n softirq,rcu: Inform RCU of irq_exit() activity\n sched: Add irq_{enter,exit}() to scheduler_ipi()\n rcu: protect __rcu_read_unlock() against scheduler-using irq handlers\n rcu: Streamline code produced by __rcu_read_unlock()\n rcu: Fix RCU_BOOST race handling current-\u003ercu_read_unlock_special\n rcu: decrease rcu_report_exp_rnp coupling with scheduler\n" }, { "commit": "e3589f6c81e4764d32a25d2a2a0afe54fa344f5c", "tree": "414bf6bdbad3f04f629fa2a72254ea85acf723f4", "parents": [ "9c3f75cbd144014bea6af866a154cc2e73ab2287" ], "author": { "name": "Peter Zijlstra", "email": "a.p.zijlstra@chello.nl", "time": "Fri Jul 15 10:35:52 2011 +0200" }, "committer": { "name": "Ingo Molnar", "email": "mingo@elte.hu", "time": "Wed Jul 20 18:32:41 2011 +0200" }, "message": "sched: Allow for overlapping sched_domain spans\n\nAllow for sched_domain spans that overlap by giving such domains their\nown sched_group list instead of sharing the sched_groups amongst\neach-other.\n\nThis is needed for machines with more than 16 nodes, because\nsched_domain_node_span() will generate a node mask from the\n16 nearest nodes without regard if these masks have any overlap.\n\nCurrently sched_domains have a sched_group that maps to their child\nsched_domain span, and since there is no overlap we share the\nsched_group between the sched_domains of the various CPUs. If however\nthere is overlap, we would need to link the sched_group list in\ndifferent ways for each cpu, and hence sharing isn\u0027t possible.\n\nIn order to solve this, allocate private sched_groups for each CPU\u0027s\nsched_domain but have the sched_groups share a sched_group_power\nstructure such that we can uniquely track the power.\n\nReported-and-tested-by: Anton Blanchard \u003canton@samba.org\u003e\nSigned-off-by: Peter Zijlstra \u003ca.p.zijlstra@chello.nl\u003e\nCc: Linus Torvalds \u003ctorvalds@linux-foundation.org\u003e\nCc: Andrew Morton \u003cakpm@linux-foundation.org\u003e\nLink: http://lkml.kernel.org/n/tip-08bxqw9wis3qti9u5inifh3y@git.kernel.org\nSigned-off-by: Ingo Molnar \u003cmingo@elte.hu\u003e\n" }, { "commit": "9c3f75cbd144014bea6af866a154cc2e73ab2287", "tree": "2a565f7ff0820269973415c5605e313cfff903b4", "parents": [ "e6625fa48e6580a74b7e700efd7e6463e282810b" ], "author": { "name": "Peter Zijlstra", "email": "a.p.zijlstra@chello.nl", "time": "Thu Jul 14 13:00:06 2011 +0200" }, "committer": { "name": "Ingo Molnar", "email": "mingo@elte.hu", "time": "Wed Jul 20 18:32:40 2011 +0200" }, "message": "sched: Break out cpu_power from the sched_group structure\n\nIn order to prepare for non-unique sched_groups per domain, we need to\ncarry the cpu_power elsewhere, so put a level of indirection in.\n\nReported-and-tested-by: Anton Blanchard \u003canton@samba.org\u003e\nSigned-off-by: Peter Zijlstra \u003ca.p.zijlstra@chello.nl\u003e\nCc: Linus Torvalds \u003ctorvalds@linux-foundation.org\u003e\nCc: Andrew Morton \u003cakpm@linux-foundation.org\u003e\nLink: http://lkml.kernel.org/n/tip-qkho2byuhe4482fuknss40ad@git.kernel.org\nSigned-off-by: Ingo Molnar \u003cmingo@elte.hu\u003e\n" }, { "commit": "7765be2fec0f476fcd61812d5f9406b04c765020", "tree": "e89ccb3fbd5655090b05f608f8e1d39924f23a9a", "parents": [ "131906b0062ddde7f85bbe67754983c754648bd8" ], "author": { "name": "Paul E. McKenney", "email": "paul.mckenney@linaro.org", "time": "Thu Jul 14 12:24:11 2011 -0700" }, "committer": { "name": "Paul E. McKenney", "email": "paulmck@linux.vnet.ibm.com", "time": "Tue Jul 19 21:38:52 2011 -0700" }, "message": "rcu: Fix RCU_BOOST race handling current-\u003ercu_read_unlock_special\n\nThe RCU_BOOST commits for TREE_PREEMPT_RCU introduced an other-task\nwrite to a new RCU_READ_UNLOCK_BOOSTED bit in the task_struct structure\u0027s\n-\u003ercu_read_unlock_special field, but, as noted by Steven Rostedt, without\ncorrectly synchronizing all accesses to -\u003ercu_read_unlock_special.\nThis could result in bits in -\u003ercu_read_unlock_special being spuriously\nset and cleared due to conflicting accesses, which in turn could result\nin deadlocks between the rcu_node structure\u0027s -\u003elock and the scheduler\u0027s\nrq and pi locks. These deadlocks would result from RCU incorrectly\nbelieving that the just-ended RCU read-side critical section had been\npreempted and/or boosted. If that RCU read-side critical section was\nexecuted with either rq or pi locks held, RCU\u0027s ensuing (incorrect)\ncalls to the scheduler would cause the scheduler to attempt to once\nagain acquire the rq and pi locks, resulting in deadlock. More complex\ndeadlock cycles are also possible, involving multiple rq and pi locks\nas well as locks from multiple rcu_node structures.\n\nThis commit fixes synchronization by creating -\u003ercu_boosted field in\ntask_struct that is accessed and modified only when holding the -\u003elock\nin the rcu_node structure on which the task is queued (on that rcu_node\nstructure\u0027s -\u003eblkd_tasks list). This results in tasks accessing only\ntheir own current-\u003ercu_read_unlock_special fields, making unsynchronized\naccess once again legal, and keeping the rcu_read_unlock() fastpath free\nof atomic instructions and memory barriers.\n\nThe reason that the rcu_read_unlock() fastpath does not need to access\nthe new current-\u003ercu_boosted field is that this new field cannot\nbe non-zero unless the RCU_READ_UNLOCK_BLOCKED bit is set in the\ncurrent-\u003ercu_read_unlock_special field. Therefore, rcu_read_unlock()\nneed only test current-\u003ercu_read_unlock_special: if that is zero, then\ncurrent-\u003ercu_boosted must also be zero.\n\nThis bug does not affect TINY_PREEMPT_RCU because this implementation\nof RCU accesses current-\u003ercu_read_unlock_special with irqs disabled,\nthus preventing races on the !SMP systems that TINY_PREEMPT_RCU runs on.\n\nMaybe-reported-by: Dave Jones \u003cdavej@redhat.com\u003e\nMaybe-reported-by: Sergey Senozhatsky \u003csergey.senozhatsky@gmail.com\u003e\nReported-by: Steven Rostedt \u003crostedt@goodmis.org\u003e\nSigned-off-by: Paul E. McKenney \u003cpaul.mckenney@linaro.org\u003e\nSigned-off-by: Paul E. McKenney \u003cpaulmck@linux.vnet.ibm.com\u003e\nReviewed-by: Steven Rostedt \u003crostedt@goodmis.org\u003e\n" }, { "commit": "4aede84b33d6beb401136a3deca0651ae07c5e99", "tree": "831266dbb15227584da5011ae4bb1e5038a69677", "parents": [ "a07405b7802691d29ab3b23bdc76ee6d006aad0b" ], "author": { "name": "Justin TerAvest", "email": "teravest@google.com", "time": "Tue Jul 12 08:31:45 2011 +0200" }, "committer": { "name": "Jens Axboe", "email": "jaxboe@fusionio.com", "time": "Tue Jul 12 08:35:10 2011 +0200" }, "message": "fixlet: Remove fs_excl from struct task.\n\nfs_excl is a poor man\u0027s priority inheritance for filesystems to hint to\nthe block layer that an operation is important. It was never clearly\nspecified, not widely adopted, and will not prevent starvation in many\ncases (like across cgroups).\n\nfs_excl was introduced with the time sliced CFQ IO scheduler, to\nindicate when a process held FS exclusive resources and thus needed\na boost.\n\nIt doesn\u0027t cover all file systems, and it was never fully complete.\nLets kill it.\n\nSigned-off-by: Justin TerAvest \u003cteravest@google.com\u003e\nSigned-off-by: Jens Axboe \u003cjaxboe@fusionio.com\u003e\n" }, { "commit": "e4c2fb0d5776b58049d2556b456144a4db3fe5a9", "tree": "04cebbb24f524408728492cfeb396d66aa6127e4", "parents": [ "cd62287e364c0d15d517c6ced4e4808b54711475" ], "author": { "name": "Peter Zijlstra", "email": "a.p.zijlstra@chello.nl", "time": "Tue Jul 05 10:56:32 2011 +0200" }, "committer": { "name": "Ingo Molnar", "email": "mingo@elte.hu", "time": "Tue Jul 05 11:28:18 2011 +0200" }, "message": "sched: Disable (revert) SCHED_LOAD_SCALE increase\n\nAlex reported that commit c8b281161df (\"sched: Increase\nSCHED_LOAD_SCALE resolution\") caused a power usage regression\nunder light load as it increases the number of load-balance\noperations and keeps idle cpus from staying idle.\n\nTime has run out to find the root cause for this release so\ndisable the feature for v3.0 until we can figure out what\ncauses the problem.\n\nReported-by: \"Alex, Shi\" \u003calex.shi@intel.com\u003e\nSigned-off-by: Peter Zijlstra \u003ca.p.zijlstra@chello.nl\u003e\nCc: Nikhil Rao \u003cncrao@google.com\u003e\nCc: Ming Lei \u003ctom.leiming@gmail.com\u003e\nCc: Mike Galbraith \u003cefault@gmx.de\u003e\nCc: Linus Torvalds \u003ctorvalds@linux-foundation.org\u003e\nCc: Andrew Morton \u003cakpm@linux-foundation.org\u003e\nLink: http://lkml.kernel.org/n/tip-m4onxn0sxnyn5iz9o88eskc3@git.kernel.org\nSigned-off-by: Ingo Molnar \u003cmingo@elte.hu\u003e\n" }, { "commit": "1ecc818c51b1f6886825dae3885792d5e49ec798", "tree": "2179ae53fa86ea6a42d01ff4efc1a3f6a32e76f2", "parents": [ "1c09ab0d257317f97e8629a3d0c8713d6dd9de4c", "d902db1eb60387040fe541573083e47469db50ac" ], "author": { "name": "Ingo Molnar", "email": "mingo@elte.hu", "time": "Fri Jul 01 13:20:51 2011 +0200" }, "committer": { "name": "Ingo Molnar", "email": "mingo@elte.hu", "time": "Fri Jul 01 13:20:51 2011 +0200" }, "message": "Merge branch \u0027sched/core-v2\u0027 of git://git.kernel.org/pub/scm/linux/kernel/git/frederic/random-tracing into sched/core\n" } ], "next": "087806b1281563e4ae7a5bce3155f894af5f4118" }